CHAPTER 3LENSES. 1.1 Basics. Convex Lens. Concave Lens. 1 Introduction to convex and concave lenses. Shape: Shape: Symbol: Symbol:

Size: px
Start display at page:

Download "CHAPTER 3LENSES. 1.1 Basics. Convex Lens. Concave Lens. 1 Introduction to convex and concave lenses. Shape: Shape: Symbol: Symbol:"

Transcription

1 CHAPTER 3LENSES 1 Introduction to convex and concave lenses 1.1 Basics Convex Lens Shape: Concave Lens Shape: Symbol: Symbol: Effect to parallel rays: Effect to parallel rays: Explanation: Explanation: Page 1

2 1.2 Standard Terminologies Convex Lens Concave Lens Page 2

3 [Concept] Which of the following ray diagrams are possible? (a) (b) (c) (d) (e) [Concept] A pair of parallel rays passes through a lens as shown. (f) (a) State the type of lens shown above. (b) Find the focal length of the lens. Page 3

4 2 Image formation 2.1 Basic construction rules Rule 1: Incoming ray // to principal axis Convex Concave Rule 2: Incoming ray through C Convex Concave Rule 3: Incoming ray through F Convex Concave Page 4

5 [Ray diagram][hkcee] If F, F' are foci and C,C are both at a distance of two times the focal length from the lens, which of the following ray diagrams is/are correct? A. (1) only B. (3) only C. (1) and (2) only D. (2) and (3) only E. (1),(2) and (3) [Ray diagram][hkcee] In the above diagram, F,F'are the foci of the concave lens and AB is an incident ray. Which of the following paths best represents the emergent ray? A. P B. Q C. R D. S E. T Page 5

6 2.2 Image formation and nature of image Example 1: Image formed by plane mirror Complete the ray diagram to locate the image. State the nature of the image. Nature of image: Example 2: Image formed by convex lens Complete the ray diagram to locate the image. State the nature of the image. Nature of image: Example 3: Image formed by concave lens Complete the ray diagram to locate the image. State the nature of the image. Nature of image: Page 6

7 2.3 Image formed by convex lens Case 1: Near object: closer than focus ( u < f ) Case 2: Mid-range object ( f< u< 2 f ) Case 3: Far object ( u> 2 f ) Page 7

8 Special Case 1.5: Object at focus ( u= f ) Special Case 2.5: Object at 2F ( u= 2 f ) Special Case 3.5: Very far object (u 恭 ) Page 8

9 Quick Summary of convex lens image 2.4 Image formed by concave lens Case only 1: Object anywhere 2.5 Distinctive features of convex and concave lenses Convex Concave Real vs virtual Erect vs inverted Magnified vs diminished Page 9

10 [Determine lens][hkcee] 05 Figure 5 shows a paper with some letters 'J' printed on it. The paper is placed behind a glass filled with water. Figure 6 shows the image of the letters formed by the glass of water. (a) State the nature of the image formed (erect or inverted, magnified or diminished, real or virtual). (2 marks) (b) Jason holds a lens in front of the paper in Figure 5 and finds that the image formed is of the same nature as that formed by the glass of water. (i) What kind of lens is held by Jason? (1 mark) (ii) Sketch a ray diagram to show how the image of the letters is formed by the lens. (3 marks) Page 10

11 3 Measuring focal length of a convex lens Method 1: Using far object (as special case 3.5) Procedures: Method 2: Using plane mirror [HKCEE] When an object O is placed in front of a convex lens and a plane mirror as shown above, an image I is formed at the same position as the object. Which of the following statements is/are correct? (1) The image I is real (2) The focal length of the lens is 10 cm (3) If the distance between the lens and the plane mirror is changed to 2 cm, the position of the image I remains unchanged. A. (1) only B. (3) only C. (1) and (2) only D. (2) and (3) only E. (1),(2) and (3) Page 11

12 Method3: Ray tracing [HKCEE] Using the apparatus in Figure 9, describe the procedures of an experiment to find the focal length of a cylindrical convex lens. [Further questions: Can this method be used to find the focal length of a concave lens?] Page 12

13 [determine lens][hkcee] A lens is used to look at some print on a paper. The image of the word ' PHYSICS' is shown above. Which of the following statements is/are true? (1) The lens is a converging lens (2) The image lies between the paper and the lens (3) The image is real A. (2) only B. (3) only C. (1) and (2) only D. (1) and (3) only E. (1),(2) and (3) [ray diagram][hkcee] In the figure above, F is the focus of the converging lens. Which of the five rays is incorrectly drawn? A. P B. Q C. R D. S E. T [lens application][hkcee] A magnifying glass is used to read some small print in a book. Which of the following statements is correct? A. The magnifying glass is a concave lens B. The image of the small print is real C. The object distance is greater than the focal length of the glass D. The image distance is shorter than the object distance E. The small print and its image are on the same side of the glass Page 13

14 [lens application][hkcee] An illuminated letter R is placed in front of a lens as shown below and an image is formed on a translucent screen. The object distance is 30 cm and the image distance is 20 cm. Which of the following statements is/are correct? (1) The lens is a converging lens (2) The image is diminished (3) The shape of the image seen by the observer is. A. (1) only B. (3) only C. (1) and (2) only D. (2) and (3) only E. (1),(2) and (3) [lens application][hkcee] (refers to above question) If a piece of paper is used to cover one-half of the lens, which of the following describes the change in the image as seen by the observer? A. The whole image can still be seen but the image becomes dimmer. B. The whole image can still be seen and its brightness remains unchanged. C. Only half of the image can be seen and the image becomes dimmer. D. Only half of the image can be seen but its brightness remains unchanged. E. The whole image disappears. Page 14

15 [single lens camera][hkcee] A cup is placed in front of a window, outside which is a distant building. Two photos P1 and P2 as shown below are taken with the same single-lens camera. Which of the following ray diagrams correctly shows how the image I of the cup O is formed by the lens of the camera in photo P1? [single lens camera][hkcee] (refers to above question) Which of the following statements about the two photos must be correct? A. In P1, the images of the cup and the building are on different sides of the lens of the camera. B. In P1, the image of the cup is real while that of the building is virtual. C. On taking P2, the distance between the lens and the film of the camera is shorter than that on taking P1. D. After taking P1, the photographer has to move forward in order to take P2. Page 15

16 4 Linear magnification Concept of linear magnification What is the linear magnification in this case? Mathematical definition of linear magnification Linear magnification by object/image distances Page 16

17 [magnification][hkcee] A student holds a magnifying glass close to his eye to look at some small print on a paper. The image of the letters "EX" is shown in Figure 4. The magnification is 3. (a) What kind of lens is used as a magnifying glass? (1 mark) (b) State the nature (real or virtual, erect or inverted) of the image. (2 marks) (c) The paper is placed at a distance of 8 cm from the lens. In Figure 5, AB represents the object, and p, q are incident rays. A scale of 1 cm representing 4 cm for the object distance is used. (i) Draw the refracted rays of p and q and the image of AB in Figure 5. (ii) From the ray diagram, measure (1) the image distance, (2) the focal length of the lens. (6 marks) Page 17

18 (d) If the paper is placed closer to the lens, how would the size of the image and the image distance be affected? Illustrate your answer with a ray diagram. (4 marks) (e) If the paper is moved away from the lens to a position beyond the focus, the student finds that a clear image cannot be observed. Explain briefly. (2 marks) Page 18

19 5 Lens formula The formula Symbols used: = u v f Notes: 1. This formula allows locating the image directly without drawing ray diagram. 2. This formula applies to BOTH convex and concave lenses, and ANY image nature, by using the following sign convention: u v f [Challenging] Prove the lens formula (in a simple case of convex lens). Page 19

20 [lens formula][hkcee modified] An illuminated object is placed at a distance 20 cm in front of a convex lens and a sharp image is formed on a screen at a distance of 16 cm from the lens. Calculate the focal length of the convex lens. [lens formula][hkcee modified] An illuminated object is placed at a distance 20 cm in front of a convex lens and a magnified image is formed at 10cm from the object. Calculate the focal length of the convex lens. FINAL REMARKS One of the most important applications of refraction of light is the use of lenses. This chapter focuses mainly on how the image is formed by a single lens. How to locate the image and what nature of the image will have. This chapter is fairly straight forward. Students should master the skills of drawing ray diagrams including the symbols, arrows, dotted lines, construction rules and all that. You MUST use ruler to construct ray diagrams. Students should also know how to determine the focal length of a lens and some important optical instruments like projector, single lens camera and magnifying glass. Although not frequently countered in examination, lens formula allows students to check their answer from ray diagrams. However, students should use the formula with care and follow exactly the sign convention. In terms of examination skills, students should most aware about the ray diagram drawing techniques. Page 20

Complete the diagram to show what happens to the rays. ... (1) What word can be used to describe this type of lens? ... (1)

Complete the diagram to show what happens to the rays. ... (1) What word can be used to describe this type of lens? ... (1) Q1. (a) The diagram shows two parallel rays of light, a lens and its axis. Complete the diagram to show what happens to the rays. (2) Name the point where the rays come together. (iii) What word can be

More information

Chapter 19 Lenses (Sample)

Chapter 19 Lenses (Sample) Chapter 19 Lenses (Sample) A. Key Examples of Exam-type Questions Problem-solving strategy How lenses produce images: Steps 1. principal axis 2. convex or concave lens 3. scale, object size and distance

More information

Final Reg Optics Review SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.

Final Reg Optics Review SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Final Reg Optics Review 1) How far are you from your image when you stand 0.75 m in front of a vertical plane mirror? 1) 2) A object is 12 cm in front of a concave mirror, and the image is 3.0 cm in front

More information

Physics II. Chapter 23. Spring 2018

Physics II. Chapter 23. Spring 2018 Physics II Chapter 23 Spring 2018 IMPORTANT: Except for multiple-choice questions, you will receive no credit if you show only an answer, even if the answer is correct. Always show in the space on your

More information

LECTURE 17 MIRRORS AND THIN LENS EQUATION

LECTURE 17 MIRRORS AND THIN LENS EQUATION LECTURE 17 MIRRORS AND THIN LENS EQUATION 18.6 Image formation with spherical mirrors Concave mirrors Convex mirrors 18.7 The thin-lens equation Sign conventions for lenses and mirrors Spherical mirrors

More information

Lenses. A lens is any glass, plastic or transparent refractive medium with two opposite faces, and at least one of the faces must be curved.

Lenses. A lens is any glass, plastic or transparent refractive medium with two opposite faces, and at least one of the faces must be curved. PHYSICS NOTES ON A lens is any glass, plastic or transparent refractive medium with two opposite faces, and at least one of the faces must be curved. Types of There are two types of basic lenses. (1.)

More information

Assignment X Light. Reflection and refraction of light. (a) Angle of incidence (b) Angle of reflection (c) principle axis

Assignment X Light. Reflection and refraction of light. (a) Angle of incidence (b) Angle of reflection (c) principle axis Assignment X Light Reflection of Light: Reflection and refraction of light. 1. What is light and define the duality of light? 2. Write five characteristics of light. 3. Explain the following terms (a)

More information

LENSES. A lens is any glass, plastic or transparent refractive medium with two opposite faces, and at least one of the faces must be curved.

LENSES. A lens is any glass, plastic or transparent refractive medium with two opposite faces, and at least one of the faces must be curved. 1 LENSES A lens is any glass, plastic or transparent refractive medium with two opposite faces, and at least one of the faces must be curved. Types of Lenses There are two types of basic lenses: Converging/

More information

Optics Practice. Version #: 0. Name: Date: 07/01/2010

Optics Practice. Version #: 0. Name: Date: 07/01/2010 Optics Practice Date: 07/01/2010 Version #: 0 Name: 1. Which of the following diagrams show a real image? a) b) c) d) e) i, ii, iii, and iv i and ii i and iv ii and iv ii, iii and iv 2. A real image is

More information

Refraction by Spherical Lenses by

Refraction by Spherical Lenses by Page1 Refraction by Spherical Lenses by www.examfear.com To begin with this topic, let s first know, what is a lens? A lens is a transparent material bound by two surfaces, of which one or both the surfaces

More information

Lenses. Images. Difference between Real and Virtual Images

Lenses. Images. Difference between Real and Virtual Images Linear Magnification (m) This is the factor by which the size of the object has been magnified by the lens in a direction which is perpendicular to the axis of the lens. Linear magnification can be calculated

More information

10.2 Images Formed by Lenses SUMMARY. Refraction in Lenses. Section 10.1 Questions

10.2 Images Formed by Lenses SUMMARY. Refraction in Lenses. Section 10.1 Questions 10.2 SUMMARY Refraction in Lenses Converging lenses bring parallel rays together after they are refracted. Diverging lenses cause parallel rays to move apart after they are refracted. Rays are refracted

More information

Converging Lenses. Parallel rays are brought to a focus by a converging lens (one that is thicker in the center than it is at the edge).

Converging Lenses. Parallel rays are brought to a focus by a converging lens (one that is thicker in the center than it is at the edge). Chapter 30: Lenses Types of Lenses Piece of glass or transparent material that bends parallel rays of light so they cross and form an image Two types: Converging Diverging Converging Lenses Parallel rays

More information

Physics 132: Lecture Fundamentals of Physics

Physics 132: Lecture Fundamentals of Physics Physics 132: Lecture Fundamentals of Physics II Agenda for Today Mirrors Concave Convex e Mirror equation Physics 201: Lecture 1, Pg 1 Curved mirrors A Spherical Mirror: section of a sphere. R light ray

More information

Lab 11: Lenses and Ray Tracing

Lab 11: Lenses and Ray Tracing Name: Lab 11: Lenses and Ray Tracing Group Members: Date: TA s Name: Materials: Ray box, two different converging lenses, one diverging lens, screen, lighted object, three stands, meter stick, two letter

More information

04. REFRACTION OF LIGHT AT CURVED SURFACES

04. REFRACTION OF LIGHT AT CURVED SURFACES CLASS-10 PHYSICAL SCIENCE 04. REFRACTION OF LIGHT AT CURVED SURFACES Questions and Answers *Reflections on Concepts* 1. Write the lens maker s formula and explain the terms in it. A. Lens maker s formula

More information

INDIAN SCHOOL MUSCAT SENIOR SECTION DEPARTMENT OF PHYSICS CLASS X REFLECTION AND REFRACTION OF LIGHT QUESTION BANK

INDIAN SCHOOL MUSCAT SENIOR SECTION DEPARTMENT OF PHYSICS CLASS X REFLECTION AND REFRACTION OF LIGHT QUESTION BANK INDIAN SCHOOL MUSCAT SENIOR SECTION DEPARTMENT OF PHYSICS CLASS X REFLECTION AND REFRACTION OF LIGHT QUESTION BANK 1. Q. A small candle 2.5cm in size is placed at 27 cm in front of concave mirror of radius

More information

Part 1 Investigating Snell s Law

Part 1 Investigating Snell s Law Geometric Optics with Lenses PURPOSE: To observe the refraction of light off through lenses; to investigate the relationship between objects and images; to study the relationship between object distance,

More information

Image Formation. Light from distant things. Geometrical optics. Pinhole camera. Chapter 36

Image Formation. Light from distant things. Geometrical optics. Pinhole camera. Chapter 36 Light from distant things Chapter 36 We learn about a distant thing from the light it generates or redirects. The lenses in our eyes create images of objects our brains can process. This chapter concerns

More information

2. The radius of curvature of a spherical mirror is 20 cm. What is its focal length?

2. The radius of curvature of a spherical mirror is 20 cm. What is its focal length? 1. Define the principle focus of a concave mirror? The principle focus of a concave mirror is a point on its principle axis to which all the light rays which are parallel and close to the axis, converge

More information

Waves & Oscillations

Waves & Oscillations Physics 42200 Waves & Oscillations Lecture 27 Geometric Optics Spring 205 Semester Matthew Jones Sign Conventions > + = Convex surface: is positive for objects on the incident-light side is positive for

More information

Geometric Optics Practice Problems. Ray Tracing - Draw at least two principle rays and show the image created by the lens or mirror.

Geometric Optics Practice Problems. Ray Tracing - Draw at least two principle rays and show the image created by the lens or mirror. Geometric Optics Practice Problems Ray Tracing - Draw at least two principle rays and show the image created by the lens or mirror. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Practice Problems - Mirrors Classwork

More information

Mirrors, Lenses &Imaging Systems

Mirrors, Lenses &Imaging Systems Mirrors, Lenses &Imaging Systems We describe the path of light as straight-line rays And light rays from a very distant point arrive parallel 145 Phys 24.1 Mirrors Standing away from a plane mirror shows

More information

AP Physics Problems -- Waves and Light

AP Physics Problems -- Waves and Light AP Physics Problems -- Waves and Light 1. 1974-3 (Geometric Optics) An object 1.0 cm high is placed 4 cm away from a converging lens having a focal length of 3 cm. a. Sketch a principal ray diagram for

More information

Activity 6.1 Image Formation from Spherical Mirrors

Activity 6.1 Image Formation from Spherical Mirrors PHY385H1F Introductory Optics Practicals Day 6 Telescopes and Microscopes October 31, 2011 Group Number (number on Intro Optics Kit):. Facilitator Name:. Record-Keeper Name: Time-keeper:. Computer/Wiki-master:..

More information

NORTHERN ILLINOIS UNIVERSITY PHYSICS DEPARTMENT. Physics 211 E&M and Quantum Physics Spring Lab #8: Thin Lenses

NORTHERN ILLINOIS UNIVERSITY PHYSICS DEPARTMENT. Physics 211 E&M and Quantum Physics Spring Lab #8: Thin Lenses NORTHERN ILLINOIS UNIVERSITY PHYSICS DEPARTMENT Physics 211 E&M and Quantum Physics Spring 2018 Lab #8: Thin Lenses Lab Writeup Due: Mon/Wed/Thu/Fri, April 2/4/5/6, 2018 Background In the previous lab

More information

Converging and Diverging Surfaces. Lenses. Converging Surface

Converging and Diverging Surfaces. Lenses. Converging Surface Lenses Sandy Skoglund 2 Converging and Diverging s AIR Converging If the surface is convex, it is a converging surface in the sense that the parallel rays bend toward each other after passing through the

More information

PHYSICS 289 Experiment 8 Fall Geometric Optics II Thin Lenses

PHYSICS 289 Experiment 8 Fall Geometric Optics II Thin Lenses PHYSICS 289 Experiment 8 Fall 2005 Geometric Optics II Thin Lenses Please look at the chapter on lenses in your text before this lab experiment. Please submit a short lab report which includes answers

More information

Option G 2: Lenses. The diagram below shows the image of a square grid as produced by a lens that does not cause spherical aberration.

Option G 2: Lenses. The diagram below shows the image of a square grid as produced by a lens that does not cause spherical aberration. Name: Date: Option G 2: Lenses 1. This question is about spherical aberration. The diagram below shows the image of a square grid as produced by a lens that does not cause spherical aberration. In the

More information

Laboratory 7: Properties of Lenses and Mirrors

Laboratory 7: Properties of Lenses and Mirrors Laboratory 7: Properties of Lenses and Mirrors Converging and Diverging Lens Focal Lengths: A converging lens is thicker at the center than at the periphery and light from an object at infinity passes

More information

Reading: Lenses and Mirrors; Applications Key concepts: Focal points and lengths; real images; virtual images; magnification; angular magnification.

Reading: Lenses and Mirrors; Applications Key concepts: Focal points and lengths; real images; virtual images; magnification; angular magnification. Reading: Lenses and Mirrors; Applications Key concepts: Focal points and lengths; real images; virtual images; magnification; angular magnification. 1.! Questions about objects and images. Can a virtual

More information

Chapter 18 Optical Elements

Chapter 18 Optical Elements Chapter 18 Optical Elements GOALS When you have mastered the content of this chapter, you will be able to achieve the following goals: Definitions Define each of the following terms and use it in an operational

More information

Question 1: Define the principal focus of a concave mirror. Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from

More information

Gaussian Ray Tracing Technique

Gaussian Ray Tracing Technique Gaussian Ray Tracing Technique Positive Lenses. A positive lens has two focal points one on each side of the lens; both are at the same focal distance f from the lens. Parallel rays of light coming from

More information

Physics 132: Lecture Fundamentals of Physics II

Physics 132: Lecture Fundamentals of Physics II Physics 132: Lecture Fundamentals of Physics II Mirrors Agenda for Today Concave Convex Mirror equation Curved mirrors A Spherical Mirror: section of a sphere. R light ray C Concave mirror principal axis

More information

Instructions. To run the slideshow:

Instructions. To run the slideshow: Instructions To run the slideshow: Click: view full screen mode, or press Ctrl +L. Left click advances one slide, right click returns to previous slide. To exit the slideshow press the Esc key. Optical

More information

Light - Reflection and Refraction

Light - Reflection and Refraction Light - Reflection and Refraction Question 1: Define the principal focus of a concave mirror. Answer: Light rays that are parallel to the principal axis of a concave mirror converge at a specific point

More information

Chapter 36. Image Formation

Chapter 36. Image Formation Chapter 36 Image Formation Real and Virtual Images Real images can be displayed on screens Virtual Images can not be displayed onto screens. Focal Length& Radius of Curvature When the object is very far

More information

Algebra Based Physics. Reflection. Slide 1 / 66 Slide 2 / 66. Slide 3 / 66. Slide 4 / 66. Slide 5 / 66. Slide 6 / 66.

Algebra Based Physics. Reflection. Slide 1 / 66 Slide 2 / 66. Slide 3 / 66. Slide 4 / 66. Slide 5 / 66. Slide 6 / 66. Slide 1 / 66 Slide 2 / 66 Algebra Based Physics Geometric Optics 2015-12-01 www.njctl.org Slide 3 / 66 Slide 4 / 66 Table of ontents lick on the topic to go to that section Reflection Refraction and Snell's

More information

Geometric Optics. Ray Model. assume light travels in straight line uses rays to understand and predict reflection & refraction

Geometric Optics. Ray Model. assume light travels in straight line uses rays to understand and predict reflection & refraction Geometric Optics Ray Model assume light travels in straight line uses rays to understand and predict reflection & refraction General Physics 2 Geometric Optics 1 Reflection Law of reflection the angle

More information

King Saud University College of Science Physics & Astronomy Dept.

King Saud University College of Science Physics & Astronomy Dept. King Saud University College of Science Physics & Astronomy Dept. PHYS 111 (GENERAL PHYSICS 2) CHAPTER 36: Image Formation LECTURE NO. 9 Presented by Nouf Saad Alkathran 36.1 Images Formed by Flat Mirrors

More information

2015 EdExcel A Level Physics EdExcel A Level Physics. Lenses

2015 EdExcel A Level Physics EdExcel A Level Physics. Lenses 2015 EdExcel A Level Physics 2015 EdExcel A Level Physics Topic Topic 5 5 Lenses Types of lenses Converging lens bi-convex has two convex surfaces Diverging lens bi-concave has two concave surfaces Thin

More information

13. Optical Instruments*

13. Optical Instruments* 13. Optical Instruments* Objective: Here what you have been learning about thin lenses is applied to make a telescope. In the process you encounter general optical instrument design concepts. The learning

More information

WAVES: LENSES QUESTIONS

WAVES: LENSES QUESTIONS WAVES: LENSES QUESTIONS LIGHT (2016;1) Tim was looking into a convex mirror ball in his garden. Standing behind a small plant, he noticed that when he looked at the reflection of the plant in the convex

More information

Chapter 24 Geometrical Optics. Copyright 2010 Pearson Education, Inc.

Chapter 24 Geometrical Optics. Copyright 2010 Pearson Education, Inc. Chapter 24 Geometrical Optics Lenses convex (converging) concave (diverging) Mirrors Ray Tracing for Mirrors We use three principal rays in finding the image produced by a curved mirror. The parallel ray

More information

Gaussian Ray Tracing Technique

Gaussian Ray Tracing Technique Gaussian Ray Tracing Technique Positive Lenses. A positive lens has two focal points one on each side of the lens; both are at the same focal distance f from the lens. Parallel rays of light coming from

More information

Class-X Assignment (Chapter-10) Light-Reflection & Refraction

Class-X Assignment (Chapter-10) Light-Reflection & Refraction Class-X Assignment (Chapter-10) Light-Reflection & Refraction Q 1. How does light enable us to see an object? Q 2. What is a concave mirror? Q 3. What is the relationship between focal length and radius

More information

WAVES: REFLECTION QUESTIONS

WAVES: REFLECTION QUESTIONS WAVES: REFLECTION QUESTIONS Concave and convex mirrors (2017;1) Sarah placed a candle in front of a concave mirror. Draw two rays from the candle (object) to locate the position of the image. Draw and

More information

Test Review # 8. Physics R: Form TR8.17A. Primary colors of light

Test Review # 8. Physics R: Form TR8.17A. Primary colors of light Physics R: Form TR8.17A TEST 8 REVIEW Name Date Period Test Review # 8 Light and Color. Color comes from light, an electromagnetic wave that travels in straight lines in all directions from a light source

More information

Physics Worksheet. Topic -Light. Q1 If the radius of curvature of spherical mirror is 20 cm, what is its focal length.

Physics Worksheet. Topic -Light. Q1 If the radius of curvature of spherical mirror is 20 cm, what is its focal length. Physics Worksheet Topic -Light Q1 If the radius of curvature of spherical mirror is 20 cm, what is its focal length. (Ans: 10 cm) Q2 Calculate the radius of curvature of spherical mirror whose focal length

More information

JPN Pahang Physics Module Form 4 Chapter 5 Light. In each of the following sentences, fill in the bracket the appropriate word or words given below.

JPN Pahang Physics Module Form 4 Chapter 5 Light. In each of the following sentences, fill in the bracket the appropriate word or words given below. JPN Pahang Physics Module orm 4 HAPTER 5: LIGHT In each of the following sentences, fill in the bracket the appropriate word or words given below. solid, liquid, gas, vacuum, electromagnetic wave, energy

More information

Algebra Based Physics. Reflection. Slide 1 / 66 Slide 2 / 66. Slide 3 / 66. Slide 4 / 66. Slide 5 / 66. Slide 6 / 66.

Algebra Based Physics. Reflection. Slide 1 / 66 Slide 2 / 66. Slide 3 / 66. Slide 4 / 66. Slide 5 / 66. Slide 6 / 66. Slide 1 / 66 Slide 2 / 66 lgebra ased Physics Geometric Optics 2015-12-01 www.njctl.org Slide 3 / 66 Slide 4 / 66 Table of ontents lick on the topic to go to that section Reflection Refraction and Snell's

More information

Determination of Focal Length of A Converging Lens and Mirror

Determination of Focal Length of A Converging Lens and Mirror Physics 41 Determination of Focal Length of A Converging Lens and Mirror Objective: Apply the thin-lens equation and the mirror equation to determine the focal length of a converging (biconvex) lens and

More information

Refraction is the when a ray changes mediums. Examples of mediums:

Refraction is the when a ray changes mediums. Examples of mediums: Refraction and Lenses Refraction is the when a ray changes mediums. Examples of mediums: Lenses are optical devices which take advantage of the refraction of light to 1. produces images real and 2. change

More information

Exam 4--PHYS 102--S15

Exam 4--PHYS 102--S15 Name: Class: Date: Exam 4--PHYS 102--S15 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A mirror produces an upright image. The object is 2 cm high; the

More information

Experiment 3: Reflection

Experiment 3: Reflection Model No. OS-8515C Experiment 3: Reflection Experiment 3: Reflection Required Equipment from Basic Optics System Light Source Mirror from Ray Optics Kit Other Required Equipment Drawing compass Protractor

More information

REFLECTION THROUGH LENS

REFLECTION THROUGH LENS REFLECTION THROUGH LENS A lens is a piece of transparent optical material with one or two curved surfaces to refract light rays. It may converge or diverge light rays to form an image. Lenses are mostly

More information

Geometric Optics. PSI AP Physics 2. Multiple-Choice

Geometric Optics. PSI AP Physics 2. Multiple-Choice Geometric Optics PSI AP Physics 2 Name Multiple-Choice 1. When an object is placed in front of a plane mirror the image is: (A) Upright, magnified and real (B) Upright, the same size and virtual (C) Inverted,

More information

PHYS 160 Astronomy. When analyzing light s behavior in a mirror or lens, it is helpful to use a technique called ray tracing.

PHYS 160 Astronomy. When analyzing light s behavior in a mirror or lens, it is helpful to use a technique called ray tracing. Optics Introduction In this lab, we will be exploring several properties of light including diffraction, reflection, geometric optics, and interference. There are two sections to this lab and they may

More information

Lenses- Worksheet. (Use a ray box to answer questions 3 to 7)

Lenses- Worksheet. (Use a ray box to answer questions 3 to 7) Lenses- Worksheet 1. Look at the lenses in front of you and try to distinguish the different types of lenses? Describe each type and record its characteristics. 2. Using the lenses in front of you, look

More information

E X P E R I M E N T 12

E X P E R I M E N T 12 E X P E R I M E N T 12 Mirrors and Lenses Produced by the Physics Staff at Collin College Copyright Collin College Physics Department. All Rights Reserved. University Physics II, Exp 12: Mirrors and Lenses

More information

LIGHT REFLECTION AND REFRACTION

LIGHT REFLECTION AND REFRACTION LIGHT REFLECTION AND REFRACTION 1. List four properties of the image formed by a plane mirror. Properties of image formed by a plane mirror: 1. It is always virtual and erect. 2. Its size is equal to that

More information

Exam 4. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.

Exam 4. Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question. Name: Class: Date: Exam 4 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Mirages are a result of which physical phenomena a. interference c. reflection

More information

Downloaded from

Downloaded from QUESTION BANK SCIENCE STD-X PHYSICS REFLECTION & REFRACTION OF LIGHT (REVISION QUESTIONS) VERY SHORT ANSWER TYPE (1 MARK) 1. Out of red and blue lights, for which is the refractive index of glass greater?

More information

CHAPTER 18 REFRACTION & LENSES

CHAPTER 18 REFRACTION & LENSES Physics Approximate Timeline Students are expected to keep up with class work when absent. CHAPTER 18 REFRACTION & LENSES Day Plans for the day Assignments for the day 1 18.1 Refraction of Light o Snell

More information

Physics 197 Lab 7: Thin Lenses and Optics

Physics 197 Lab 7: Thin Lenses and Optics Physics 197 Lab 7: Thin Lenses and Optics Equipment: Item Part # Qty per Team # of Teams Basic Optics Light Source PASCO OS-8517 1 12 12 Power Cord for Light Source 1 12 12 Ray Optics Set (Concave Lens)

More information

Name. Light Chapter Summary Cont d. Refraction

Name. Light Chapter Summary Cont d. Refraction Page 1 of 17 Physics Week 12(Sem. 2) Name Light Chapter Summary Cont d with a smaller index of refraction to a material with a larger index of refraction, the light refracts towards the normal line. Also,

More information

GRADE 11-LESSON 2 PHENOMENA RELATED TO OPTICS

GRADE 11-LESSON 2 PHENOMENA RELATED TO OPTICS REFLECTION OF LIGHT GRADE 11-LESSON 2 PHENOMENA RELATED TO OPTICS 1.i. What is reflection of light?.. ii. What are the laws of reflection? a...... b.... iii. Consider the diagram at the right. Which one

More information

Converging Lens. Goal: To measure the focal length of a converging lens using various methods and to study how a converging lens forms a real image.

Converging Lens. Goal: To measure the focal length of a converging lens using various methods and to study how a converging lens forms a real image. Converging Lens Goal: To measure the focal length of a converging lens using various methods and to study how a converging lens forms a real image. Lab Preparation The picture on the screen in a movie

More information

Physics 228 Lecture 3. Today: Spherical Mirrors Lenses.

Physics 228 Lecture 3. Today: Spherical Mirrors Lenses. Physics 228 Lecture 3 Today: Spherical Mirrors Lenses www.physics.rutgers.edu/ugrad/228 a) Santa as he sees himself in a mirrored sphere. b) Santa as he sees himself in a flat mirror after too much eggnog.

More information

30 Lenses. Lenses change the paths of light.

30 Lenses. Lenses change the paths of light. Lenses change the paths of light. A light ray bends as it enters glass and bends again as it leaves. Light passing through glass of a certain shape can form an image that appears larger, smaller, closer,

More information

BHARATIYA VIDYA BHAVAN S V M PUBLIC SCHOOL, VADODARA QUESTION BANK

BHARATIYA VIDYA BHAVAN S V M PUBLIC SCHOOL, VADODARA QUESTION BANK BHARATIYA VIDYA BHAVAN S V M PUBLIC SCHOOL, VADODARA QUESTION BANK Ch Light : Reflection and Refraction One mark questions Q1 Q3 What happens when a ray of light falls normally on the surface of a plane

More information

Condition Mirror Refractive Lens Concave Focal Length Positive Focal Length Negative. Image distance positive

Condition Mirror Refractive Lens Concave Focal Length Positive Focal Length Negative. Image distance positive Comparison between mirror lenses and refractive lenses Condition Mirror Refractive Lens Concave Focal Length Positive Focal Length Negative Convex Focal Length Negative Focal Length Positive Image location

More information

Ch 24. Geometric Optics

Ch 24. Geometric Optics text concept Ch 24. Geometric Optics Fig. 24 3 A point source of light P and its image P, in a plane mirror. Angle of incidence =angle of reflection. text. Fig. 24 4 The blue dashed line through object

More information

Lab 8 Microscope. Name. I. Introduction/Theory

Lab 8 Microscope. Name. I. Introduction/Theory Lab 8 Microscope Name I. Introduction/Theory The purpose of this experiment is to construct a microscope and determine the magnification. A microscope magnifies an object that is close to the microscope.

More information

Astronomy 80 B: Light. Lecture 9: curved mirrors, lenses, aberrations 29 April 2003 Jerry Nelson

Astronomy 80 B: Light. Lecture 9: curved mirrors, lenses, aberrations 29 April 2003 Jerry Nelson Astronomy 80 B: Light Lecture 9: curved mirrors, lenses, aberrations 29 April 2003 Jerry Nelson Sensitive Countries LLNL field trip 2003 April 29 80B-Light 2 Topics for Today Optical illusion Reflections

More information

Practice Problems (Geometrical Optics)

Practice Problems (Geometrical Optics) 1 Practice Problems (Geometrical Optics) 1. A convex glass lens (refractive index = 3/2) has a focal length of 8 cm when placed in air. What is the focal length of the lens when it is immersed in water

More information

Lenses. A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope

Lenses. A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope SNC2D Lenses A transparent object used to change the path of light Examples: Human eye Eye glasses Camera Microscope Telescope Reading stones used by monks, nuns, and scholars ~1000 C.E. Lenses THERE ARE

More information

DELHI PUBLIC SCHOOL JALANDHAR. (a) Assignment will be discussed and solved in the Class. ( In Physics Notebook)

DELHI PUBLIC SCHOOL JALANDHAR. (a) Assignment will be discussed and solved in the Class. ( In Physics Notebook) DELHI PUBLIC SCHOOL JALANDHAR DELHI REVISION ASSIGNMENT NO. 3 Instructions: SUBJECT: PHYSICS CLASS:10 Previous Year Questions (Miscellaneous ) (a) Assignment will be discussed and solved in the Class.

More information

LAB 12 Reflection and Refraction

LAB 12 Reflection and Refraction Cabrillo College Physics 10L Name LAB 12 Reflection and Refraction Read Hewitt Chapters 28 and 29 What to learn and explore Please read this! When light rays reflect off a mirror surface or refract through

More information

The Indian Academy Nehrugram DEHRADUN Question Bank Subject - Physics Class - X

The Indian Academy Nehrugram DEHRADUN Question Bank Subject - Physics Class - X The Indian Academy Nehrugram DEHRADUN Question Bank - 2013-14 Subject - Physics Class - X Section A A- One mark questions:- Q1. Chair, Table are the example of which object? Q2. In which medium does the

More information

Section A Conceptual and application type questions. 1 Which is more observable diffraction of light or sound? Justify. (1)

Section A Conceptual and application type questions. 1 Which is more observable diffraction of light or sound? Justify. (1) INDIAN SCHOOL MUSCAT Department of Physics Class : XII Physics Worksheet - 6 (2017-2018) Chapter 9 and 10 : Ray Optics and wave Optics Section A Conceptual and application type questions 1 Which is more

More information

28 Thin Lenses: Ray Tracing

28 Thin Lenses: Ray Tracing 28 Thin Lenses: Ray Tracing A lens is a piece of transparent material whose surfaces have been shaped so that, when the lens is in another transparent material (call it medium 0), light traveling in medium

More information

Physics 1230 Homework 8 Due Friday June 24, 2016

Physics 1230 Homework 8 Due Friday June 24, 2016 At this point, you know lots about mirrors and lenses and can predict how they interact with light from objects to form images for observers. In the next part of the course, we consider applications of

More information

Lab 10: Lenses & Telescopes

Lab 10: Lenses & Telescopes Physics 2020, Fall 2010 Lab 8 page 1 of 6 Circle your lab day and time. Your name: Mon Tue Wed Thu Fri TA name: 8-10 10-12 12-2 2-4 4-6 INTRODUCTION Lab 10: Lenses & Telescopes In this experiment, you

More information

Physics 132: Lecture Fundamentals of Physics II

Physics 132: Lecture Fundamentals of Physics II Physics 132: Lecture Fundamentals of Physics II Mirrors Agenda for Today Concave Convex Mirror equation Curved Mirrors A Spherical Mirror: section of a sphere. R light ray C Concave mirror principal axis

More information

PRINCIPLE PROCEDURE ACTIVITY. AIM To observe diffraction of light due to a thin slit.

PRINCIPLE PROCEDURE ACTIVITY. AIM To observe diffraction of light due to a thin slit. ACTIVITY 12 AIM To observe diffraction of light due to a thin slit. APPARATUS AND MATERIAL REQUIRED Two razor blades, one adhesive tape/cello-tape, source of light (electric bulb/ laser pencil), a piece

More information

Chapter 29/30. Wave Fronts and Rays. Refraction of Sound. Dispersion in a Prism. Index of Refraction. Refraction and Lenses

Chapter 29/30. Wave Fronts and Rays. Refraction of Sound. Dispersion in a Prism. Index of Refraction. Refraction and Lenses Chapter 29/30 Refraction and Lenses Refraction Refraction the bending of waves as they pass from one medium into another. Caused by a change in the average speed of light. Analogy A car that drives off

More information

ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects.

ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects. Light i) Light is a form of energy which helps us to see objects. ii) When light falls on objects, it reflects the light and when the reflected light reaches our eyes then we see the objects. iii) Light

More information

LLT Education Services

LLT Education Services Rahul Arora 1. Which of the following can make a parallel beam of light when light from a point source is incident on it? (a) Concave mirror as well as convex lens (b) Convex mirror as well as concave

More information

Chapter 34 Geometric Optics

Chapter 34 Geometric Optics Chapter 34 Geometric Optics Lecture by Dr. Hebin Li Goals of Chapter 34 To see how plane and curved mirrors form images To learn how lenses form images To understand how a simple image system works Reflection

More information

Focal Length of Lenses

Focal Length of Lenses Focal Length of Lenses OBJECTIVES Investigate the properties of converging and diverging lenses. Determine the focal length of converging lenses both by a real image of a distant object and by finite object

More information

Physics 1411 Telescopes Lab

Physics 1411 Telescopes Lab Name: Section: Partners: Physics 1411 Telescopes Lab Refracting and Reflecting telescopes are the two most common types of telescopes you will find. Each of these can be mounted on either an equatorial

More information

Refraction and Lenses

Refraction and Lenses Refraction and Lenses Name Q.(a) Figure shows a ray of light entering a glass block. (i) The angle of incidence in Figure is labelled with the letter i. On Figure, use the letter r to label the angle of

More information

always positive for virtual image

always positive for virtual image Point to be remembered: sign convention for Spherical mirror Object height, h = always positive Always +ve for virtual image Image height h = Always ve for real image. Object distance from pole (u) = always

More information

Chapter 2 - Geometric Optics

Chapter 2 - Geometric Optics David J. Starling Penn State Hazleton PHYS 214 The human eye is a visual system that collects light and forms an image on the retina. The human eye is a visual system that collects light and forms an image

More information

Thin Lenses. Lecture 25. Chapter 23. Ray Optics. Physics II. Course website:

Thin Lenses. Lecture 25. Chapter 23. Ray Optics. Physics II. Course website: Lecture 25 Chapter 23 Physics II Ray Optics Thin Lenses Course website: http://faculty.uml.edu/andriy_danylov/teaching/physicsii Lecture Capture: http://echo360.uml.edu/danylov201415/physics2spring.html

More information

Test Review # 9. Physics R: Form TR9.15A. Primary colors of light

Test Review # 9. Physics R: Form TR9.15A. Primary colors of light Physics R: Form TR9.15A TEST 9 REVIEW Name Date Period Test Review # 9 Light and Color. Color comes from light, an electromagnetic wave that travels in straight lines in all directions from a light source

More information

Ch. 18 Notes 3/28/16

Ch. 18 Notes 3/28/16 Section 1 Light & Color: Vocabulary Transparent material: transmits most of the light that strikes it. Light passes through without being scattered, so you can see clearly what is on the other side. Ex.

More information

REFRACTION OF LIGHT VERY SHORT ANSWER QUESTIONS

REFRACTION OF LIGHT VERY SHORT ANSWER QUESTIONS REFRACTION OF LIGHT VERY SHORT ANSWER QUESTIONS Q-1. The earth takes 24 h to rotate once about its axis. How much time does the sun take to shift by 1 0 when viewed from the earth? Q-2. What is the maximum

More information