# Lecture Outline Chapter 27. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc.

Save this PDF as:

Size: px
Start display at page:

Download "Lecture Outline Chapter 27. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc."

## Transcription

1 Lecture Outline Chapter 27 Physics, 4 th Edition James S. Walker

2 Chapter 27 Optical Instruments

3 Units of Chapter 27 The Human Eye and the Camera Lenses in Combination and Corrective Optics The Magnifying Glass The Compound Microscope Telescopes Lens Aberrations

4 27-1 The Human Eye and the Camera Light passes through the cornea of the human eye and is focused by the lens on the retina. The ciliary muscles change the shape of the lens, so it can focus at different distances. The vitreous and aqueous humors are transparent. Rods and cones on the retina convert the light into electrical impulses, which travel down the optic nerve to the brain.

5 27-1 The Human Eye and the Camera The eye produces a real, inverted image on the retina. Why don t things look upside down to us? The brain adjusts the image to appear properly.

6 27-1 The Human Eye and the Camera The ciliary muscles adjust the shape of the lens to accommodate near and far vision.

7 27-1 The Human Eye and the Camera The near point is the closest point to the eye that the lens is able to focus. For those with normal vision, it is about 25 cm from the eye, but increases with age as the lens becomes less flexible. The far point is the farthest point at which the eye can focus; it is infinitely far away, if vision is normal.

8 27-1 The Human Eye and the Camera The simplest camera consists of a lens and film in a light-tight box:

9 27-1 The Human Eye and the Camera The camera lens cannot change shape; it moves closer to or farther away from the film in order to focus. The f-number characterizes the size of the aperture: The combination of f-number and shutter speed determines the amount of light that reaches the film.

10 27-2 Lenses in Combination and Corrective Optics In a two-lens system, the image produced by the first lens serves as the object for the second lens.

11 27-2 Lenses in Combination and Corrective Optics To find the image formed by a combination of lenses, consider each lens in turn, starting with the one closest to the object. The total magnification is the product of the magnifications of each lens.

12 27-2 Lenses in Combination and Corrective Optics A nearsighted person has a far point that is a finite distance away; objects farther away will appear blurry. This is due to the lens focusing too strongly, so the image is formed in front of the retina.

13 27-2 Lenses in Combination and Corrective Optics To correct this, a diverging lens is used. Its focal length is such that a distant object forms an image at the far point:

14 27-2 Lenses in Combination and Corrective Optics The strength of corrective lenses is usually quoted as refractive power, which is the inverse of the focal length:

15 27-2 Lenses in Combination and Corrective Optics A person who is farsighted can see distant objects clearly, but cannot focus on close objects the near point is too far away. The lens of the eye is not strong enough, and the image focus is behind the retina.

16 27-2 Lenses in Combination and Corrective Optics To correct farsightedness, a converging lens is used to augment the converging power of the eye. The final image is past the near point:

17 27-3 The Magnifying Glass A magnifying glass is a simple convex lens. Working in conjunction with the eye, it makes objects appear bigger because it makes them appear closer. Similar to a corrective lens for farsightedness, it brings the near point closer to the eye.

18 27-3 The Magnifying Glass The angular size of an object is the angle it subtends on the retina, and depends both on the size of the object and its distance from the eye.

19 27-3 The Magnifying Glass This angle, assuming it is small, is given by the height of the object divided by its distance from the eye. If the object is moved closer to the eye, its angular size increases. If it is placed at the near point, its size is:

20 27-3 The Magnifying Glass Now, place a converging lens whose focal length is less than N very close to the eye, and place the object at the focal point of the lens. This gives the object a larger angular size.

21 27-3 The Magnifying Glass The angular magnification is then given by:

22 27-3 The Magnifying Glass The magnification can be maximized by having the image at the near point:

23 27-4 The Compound Microscope A compound microscope has, in its simplest form, two converging lenses. One, the eyepiece, is close to the eye, while the objective is close to the object.

24 27-4 The Compound Microscope The object is placed near the focal point of the objective lens, giving a magnification of: The image formed is at the focal point of the eyepiece, which produces an image at infinity:

25 27-4 The Compound Microscope The total magnification is given above, and is the product of the magnification of each lens.

26 27-5 Telescopes Telescopes are similar to microscopes in that they have an objective and an eyepiece. However, the objects observed are essentially at infinity, so the light will be focused at the focal point of the objective. The objects themselves are very large, but their angular size is very small due to their great distance.

27 27-5 Telescopes The image formed by the objective is at the focal point of the eyepiece.

28 27-5 Telescopes The total magnification of the telescope is the product of the magnification of each lens, and is: Telescopes using lenses are called refractors; the first telescopes made were of this type.

29 27-5 Telescopes It is desirable to have the objective of a telescope be as large as possible, so that it may collect as much light as possible. Each doubling of the diameter of the objective gives four times as much light. Very large lenses are difficult to handle; they are thick and heavy, must have two precision surfaces, and absorb more of the light the thicker they are.

30 27-5 Telescopes Therefore, large telescopes are now made as reflectors the objective is a mirror rather than a lens. The mirror has only one surface, can be made very thin, and reflects almost all the light that hits it.

31 27-6 Lens Aberrations Spherical aberration occurs when light striking the lens far from the axis does not focus properly. It can be fixed by grinding the lens to a precision, non-spherical shape.

32 27-6 Lens Aberrations Chromatic aberration occurs when different colors of light focus at different points.

33 27-6 Lens Aberrations Chromatic aberration can be improved by combining two or more lenses that tend to cancel each other s aberrations. This only works perfectly for a single wavelength, however.

34 Summary of Chapter 27 The human eye is focused by the ciliary muscles, which change the shape of the lens. A camera is focused by changing the distance from the lens to the film. The near point is the closest point at which the eye can focus, typically 25 cm. The far point is the farthest point at which the eye can focus, typically at infinity. f-number of a lens:

35 Summary of Chapter 27 In lens combinations, the image formed by one lens serves as the object for the next. Nearsightedness occurs when the image is focused in front of the retina, causing the far point to be closer than infinity. It can be corrected with a diverging lens. Farsightedness occurs when the image is focused behind the retina, causing the near point to be more than 25 cm from the eye. It can be corrected by a converging lens.

36 Summary of Chapter 27 Refractive power of a lens in diopters, when the focal length is in meters: A magnifying glass is a converging lens. Its magnification is given by:

37 Summary of Chapter 27 A compound microscope uses two lenses, the objective and the eyepiece, to form an image of a small object placed close to the focal point of the objective. Its magnification is given by:

38 Summary of Chapter 27 A refracting telescope also uses two lenses to form an image of a very distant object. Its magnification is given by: The length of the telescope will be: A telescope having a mirror instead of a lens as the objective is called a reflecting telescope.

39 Summary of Chapter 27 Lens aberrations can distort images. Spherical aberration occurs because off-axis rays do not focus at the focal point. It can be corrected by precision shaping of the lens. Chromatic aberration occurs because different frequencies of light have different indices of refraction. It can be corrected by using multiple lenses in an achromatic lens system.

### There is a range of distances over which objects will be in focus; this is called the depth of field of the lens. Objects closer or farther are

Chapter 25 Optical Instruments Some Topics in Chapter 25 Cameras The Human Eye; Corrective Lenses Magnifying Glass Telescopes Compound Microscope Aberrations of Lenses and Mirrors Limits of Resolution

### Chapter 34: Geometrical Optics (Part 2)

Chapter 34: Geometrical Optics (Part 2) Brief review Optical instruments Camera Human eye Magnifying glass Telescope Microscope Optical Aberrations Phys Phys 2435: 22: Chap. 34, 31, Pg 1 The Lens Equation

### Lecture PowerPoint. Chapter 25 Physics: Principles with Applications, 6 th edition Giancoli

Lecture PowerPoint Chapter 25 Physics: Principles with Applications, 6 th edition Giancoli 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the

### MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Exam Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A plane mirror is placed on the level bottom of a swimming pool that holds water (n =

### Topic 4: Lenses and Vision. Lens a curved transparent material through which light passes (transmit) Ex) glass, plastic

Topic 4: Lenses and Vision Lens a curved transparent material through which light passes (transmit) Ex) glass, plastic Double Concave Lenses Are thinner and flatter in the middle than around the edges.

### PHYS:1200 LECTURE 31 LIGHT AND OPTICS (3)

1 PHYS:1200 LECTURE 31 LIGHT AND OPTICS (3) In lecture 30, we applied the law of reflection to understand how images are formed using plane and curved mirrors. In this lecture we will use the law of refraction

### 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

### Chapter 34: Geometric Optics

Chapter 34: Geometric Optics It is all about images How we can make different kinds of images using optical devices Optical device example: mirror, a piece of glass, telescope, microscope, kaleidoscope,

### c v n = n r Sin n c = n i Refraction of Light Index of Refraction Snell s Law or Refraction Example Problem Total Internal Reflection Optics

Refraction is the bending of the path of a light wave as it passes from one material into another material. Refraction occurs at the boundary and is caused by a change in the speed of the light wave upon

### Dr. Todd Satogata (ODU/Jefferson Lab) Monday, April

University Physics 227N/232N Mirrors and Lenses Homework Optics 2 due Friday AM Quiz Friday Optional review session next Monday (Apr 28) Bring Homework Notebooks to Final for Grading Dr. Todd Satogata

### 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

### 1) An electromagnetic wave is a result of electric and magnetic fields acting together. T 1)

Exam 3 Review Name TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 1) An electromagnetic wave is a result of electric and magnetic fields acting together. T 1) 2) Electromagnetic

### 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

### University of Rochester Department of Physics and Astronomy Physics123, Spring Homework 5 - Solutions

Problem 5. University of Rochester Department of Physics and Astronomy Physics23, Spring 202 Homework 5 - Solutions An optometrist finds that a farsighted person has a near point at 25 cm. a) If the eye

### Refraction, Lenses, and Prisms

CHAPTER 16 14 SECTION Sound and Light Refraction, Lenses, and Prisms KEY IDEAS As you read this section, keep these questions in mind: What happens to light when it passes from one medium to another? How

### The Optics of Mirrors

Use with Text Pages 558 563 The Optics of Mirrors Use the terms in the list below to fill in the blanks in the paragraphs about mirrors. reversed smooth eyes concave focal smaller reflect behind ray convex

### Chapter 26. The Refraction of Light: Lenses and Optical Instruments

Chapter 26 The Refraction of Light: Lenses and Optical Instruments 26.1 The Index of Refraction Light travels through a vacuum at a speed c=3. 00 10 8 m/ s Light travels through materials at a speed less

### CHAPTER 34. Optical Images

CHAPTER 34 1* Can a virtual image be photographed? Yes. Note that a virtual image is seen because the eye focuses the diverging rays to form a real image on the retina. Similarly, the camera lens can focus

### L 32 Light and Optics [2] The rainbow. Why is it a rain BOW? Atmospheric scattering. Different colors are refracted (bent) by different amounts

L 32 Light and Optics [2] Measurements of the speed of light The bending of light refraction Total internal reflection Dispersion Dispersion Rainbows Atmospheric scattering Blue sky and red sunsets Mirrors

### Rutgers Analytical Physics 750:228, Spring 2013 ( RUPHYS228S13 ) My Courses Course Settings University Physics with Modern Physics, 13e Young/Freedman

Signed in as RONALD GILMAN, Instructor Help Sign Out Rutgers Analytical Physics 750:228, Spring 2013 ( RUPHYS228S13 ) My Courses Course Settings University Physics with Modern Physics, 13e Young/Freedman

### Person s Optics Test KEY SSSS

Person s Optics Test KEY SSSS 2017-18 Competitors Names: School Name: All questions are worth one point unless otherwise stated. Show ALL WORK or you may not receive credit. Include correct units whenever

### 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

### Chapter 34 Geometric Optics (also known as Ray Optics) by C.-R. Hu

Chapter 34 Geometric Optics (also known as Ray Optics) by C.-R. Hu 1. Principles of image formation by mirrors (1a) When all length scales of objects, gaps, and holes are much larger than the wavelength

### INTRODUCTION THIN LENSES. Introduction. given by the paraxial refraction equation derived last lecture: Thin lenses (19.1) = 1. Double-lens systems

Chapter 9 OPTICAL INSTRUMENTS Introduction Thin lenses Double-lens systems Aberrations Camera Human eye Compound microscope Summary INTRODUCTION Knowledge of geometrical optics, diffraction and interference,

### 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

### Lecture 15 Chap. 6 Optical Instruments. Single lens instruments Eyeglasses Magnifying glass. Two lens Telescope & binoculars Microscope

Lecture 15 Chap. 6 Optical Instruments Single lens instruments Eyeglasses Magnifying glass Two lens Telescope & binoculars Microscope The projector Projection lens Field lens October 12, 2010 all these

### 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

### 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

### Mastery. Chapter Content. What is light? CHAPTER 11 LESSON 1 C A

Chapter Content Mastery What is light? LESSON 1 Directions: Use the letters on the diagram to identify the parts of the wave listed below. Write the correct letters on the line provided. 1. amplitude 2.

### 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:..

### Chapter 23 Study Questions Name: Class:

Chapter 23 Study Questions Name: Class: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. When you look at yourself in a plane mirror, you

### Instructional Resources/Materials: Light vocabulary cards printed (class set) Enough for each student (See card sort below)

Grade Level/Course: Grade 7 Life Science Lesson/Unit Plan Name: Light Card Sort Rationale/Lesson Abstract: Light vocabulary building, students identify and share vocabulary meaning. Timeframe: 10 to 20

### Information for Physics 1201 Midterm 2 Wednesday, March 27

My lecture slides are posted at http://www.physics.ohio-state.edu/~humanic/ Information for Physics 1201 Midterm 2 Wednesday, March 27 1) Format: 10 multiple choice questions (each worth 5 points) and

### !"#\$%&\$'()(*'+,&-./,'(0' focal point! parallel rays! converging lens" image of an object in a converging lens" converging lens: 3 easy rays" !

!"#\$%&\$'()(*'+,&-./,'(0' converging lens"! +,7\$,\$'! 8,9/4&:27'473'+,7\$,\$'! 84#';%4?.4:27' 1234#5\$'126%&\$'''! @4=,/4\$'! 1",'A.=47'>#,*'+,7\$,\$'473'B4

### Chapter 3 Optical Systems

Chapter 3 Optical Systems The Human Eye [Reading Assignment, Hecht 5.7.1-5.7.3; see also Smith Chapter 5] retina aqueous vitreous fovea-macula cornea lens blind spot optic nerve iris cornea f b aqueous

### 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

### 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

### Chapter 20 Human Vision

Chapter 20 GOALS When you have mastered the contents of this chapter, you will be able to achieve the following goals: Characterize the physical parameters that are significant in human vision. Visual

### CHAPTER 3 OPTICAL INSTRUMENTS

1 CHAPTER 3 OPTICAL INSTRUMENTS 3.1 Introduction The title of this chapter is to some extent false advertising, because the instruments described are the instruments of first-year optics courses, not optical

### Vision. The eye. Image formation. Eye defects & corrective lenses. Visual acuity. Colour vision. Lecture 3.5

Lecture 3.5 Vision The eye Image formation Eye defects & corrective lenses Visual acuity Colour vision Vision http://www.wired.com/wiredscience/2009/04/schizoillusion/ Perception of light--- eye-brain

### 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

### Image Formation by Lenses

Image Formation by Lenses Bởi: OpenStaxCollege Lenses are found in a huge array of optical instruments, ranging from a simple magnifying glass to the eye to a camera s zoom lens. In this section, we will

### Lecture 17. Image formation Ray tracing Calculation. Lenses Convex Concave. Mirrors Convex Concave. Optical instruments

Lecture 17. Image formation Ray tracing Calculation Lenses Convex Concave Mirrors Convex Concave Optical instruments Image formation Laws of refraction and reflection can be used to explain how lenses

### 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

### In our discussion of the behavior of light in the two previous Chapters, we

Of the many optical devices we discuss in this Chapter, the magnifying glass is the simplest. Here it is magnifying part of page 722 of this Chapter, which describes how the magnifying glass works according

### 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

### Refraction Phenomena Apparent Depth & Volume

Refraction Phenomena Apparent Depth & Volume Refraction can change the perception of depth and volume because the apparent path of light does not equal the actual path of light. 1 Underwater Vision Atmospheric

### mirrors and lenses PHY232 Remco Zegers Room W109 cyclotron building

mirrors and lenses PHY232 Remco Zegers zegers@nscl.msu.edu Room W109 cyclotron building http://www.nscl.msu.edu/~zegers/phy232.html quiz (extra credit) a ray of light moves from air to a material with

### Chapter 23. Light Geometric Optics

Chapter 23. Light Geometric Optics There are 3 basic ways to gather light and focus it to make an image. Pinhole - Simple geometry Mirror - Reflection Lens - Refraction Pinhole Camera Image Formation (the

### Exemplar for Internal Achievement Standard Level 2

Exemplar for internal assessment resource Physics 2.2A for Achievement Standard 91169 Exemplar for Internal Achievement Standard 91169 Level 2 This exemplar supports assessment against: Achievement Standard

### 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

Chapter 34 Images Copyright 34-1 Images and Plane Mirrors Learning Objectives 34.01 Distinguish virtual images from real images. 34.02 Explain the common roadway mirage. 34.03 Sketch a ray diagram for

### LO - Lab #06 - The Amazing Human Eye

LO - Lab #06 - In this lab you will examine and model one of the most amazing optical systems you will ever encounter: the human eye. You might find it helpful to review the anatomy and function of the

### Lecture 3: Geometrical Optics 1. Spherical Waves. From Waves to Rays. Lenses. Chromatic Aberrations. Mirrors. Outline

Lecture 3: Geometrical Optics 1 Outline 1 Spherical Waves 2 From Waves to Rays 3 Lenses 4 Chromatic Aberrations 5 Mirrors Christoph U. Keller, Leiden Observatory, keller@strw.leidenuniv.nl Lecture 3: Geometrical

### 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)

### O5: Lenses and the refractor telescope

O5. 1 O5: Lenses and the refractor telescope Introduction In this experiment, you will study converging lenses and the lens equation. You will make several measurements of the focal length of lenses and

### 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

### 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

### 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,

### 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.

### 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

### Lab 12. Optical Instruments

Lab 12. Optical Instruments Goals To construct a simple telescope with two positive lenses having known focal lengths, and to determine the angular magnification (analogous to the magnifying power of a

### Wonders of Light - Part I

6. Wonders of Light - Part I Light : The fastest physical quantity, which is an electromagnetic radiation travelling with the speed of 3 0 8 m/s. SCHOOL SECTION 25 SCIENCE & TECHNOLOGY MT EDUCARE LTD.

### General Physics Experiment 5 Optical Instruments: Simple Magnifier, Microscope, and Newtonian Telescope

General Physics Experiment 5 Optical Instruments: Simple Magnifier, Microscope, and Newtonian Telescope Objective: < To observe the magnifying properties of the simple magnifier, the microscope and the

### Geometric!Op9cs! Reflec9on! Refrac9on!`!Snell s!law! Mirrors!and!Lenses! Other!topics! Thin!Lens!Equa9on! Magnifica9on! Lensmaker s!formula!

Geometric!Op9cs! Reflec9on! Refrac9on!`!Snell s!law! Mirrors!and!Lenses! Thin!Lens!Equa9on! Magnifica9on! Lensmaker s!formula! Other!topics! Telescopes! Apertures! Reflec9on! Angle!of!incidence!equals!angle!of!reflec9on!

### PHYS 1020 LAB 7: LENSES AND OPTICS. Pre-Lab

PHYS 1020 LAB 7: LENSES AND OPTICS Note: Print and complete the separate pre-lab assignment BEFORE the lab. Hand it in at the start of the lab. Pre-Lab Start by reading the entire prelab and lab write-up.

### VISUAL PHYSICS ONLINE DEPTH STUDY: ELECTRON MICROSCOPES

VISUAL PHYSICS ONLINE DEPTH STUDY: ELECTRON MICROSCOPES Shortly after the experimental confirmation of the wave properties of the electron, it was suggested that the electron could be used to examine objects

### 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

### 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

### Chapter: Sound and Light

Table of Contents Chapter: Sound and Light Section 1: Sound Section 2: Reflection and Refraction of Light Section 3: Mirrors, Lenses, and the Eye Section 4: Light and Color 1 Sound Sound When an object

### Name: Lab Partner: Section:

Chapter 10 Thin Lenses Name: Lab Partner: Section: 10.1 Purpose In this experiment, the formation of images by concave and convex lenses will be explored. The application of the thin lens equation and

### Geometrical Optics Optical systems

Phys 322 Lecture 16 Chapter 5 Geometrical Optics Optical systems Magnifying glass Purpose: enlarge a nearby object by increasing its image size on retina Requirements: Image should not be inverted Image

### 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

### Reflectors vs. Refractors

1 Telescope Types - Telescopes collect and concentrate light (which can then be magnified, dispersed as a spectrum, etc). - In the end it is the collecting area that counts. - There are two primary telescope

### 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

### Chapter 28. Reflection and Refraction

Chapter 28 Reflection and Refraction Light takes the path from one point to another that is a. quickest. b. shortest. c. closest to a straight line. d. None of these. Light takes the path from one point

### Properties of optical instruments

Properties of optical instruments Visual optical systems part 1: afocal systems (telescope type) A basic optical description of the eye Power: 60 diopters (at rest) Equivalent to a single spherical surface,

### CS 443: Imaging and Multimedia Cameras and Lenses

CS 443: Imaging and Multimedia Cameras and Lenses Spring 2008 Ahmed Elgammal Dept of Computer Science Rutgers University Outlines Cameras and lenses! 1 They are formed by the projection of 3D objects.

### Optics B. Science Olympiad North Regional Tournament at the University of Florida DO NOT WRITE ON THIS BOOKLET. THIS IS AN TEST SET.

Optics B Science Olympiad North Regional Tournament at the University of Florida 1 DO NOT WRITE ON THIS BOOKLET. THIS IS AN TEST SET. Part I: General Body Knowledge Questions 2 1) (3 PTS) For much of the

### TOPICS Recap of PHYS110-1 lecture Physical Optics - 4 lectures EM spectrum and colour Light sources Interference and diffraction Polarization

TOPICS Recap of PHYS110-1 lecture Physical Optics - 4 lectures EM spectrum and colour Light sources Interference and diffraction Polarization Lens Aberrations - 3 lectures Spherical aberrations Coma, astigmatism,

### Section 1: Sound. Sound and Light Section 1

Sound and Light Section 1 Section 1: Sound Preview Key Ideas Bellringer Properties of Sound Sound Intensity and Decibel Level Musical Instruments Hearing and the Ear The Ear Ultrasound and Sonar Sound

### 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

### 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

### Notes from Lens Lecture with Graham Reed

Notes from Lens Lecture with Graham Reed Light is refracted when in travels between different substances, air to glass for example. Light of different wave lengths are refracted by different amounts. Wave

### Refraction of Light. Refraction of Light

1 Refraction of Light Activity: Disappearing coin Place an empty cup on the table and drop a penny in it. Look down into the cup so that you can see the coin. Move back away from the cup slowly until the

### The Human Eye Nearpoint of vision

The Human Eye Nearpoint of vision Rochelle Payne Ondracek Edited by Anne Starace Abstract The human ability to see is the result of an intricate interconnection of muscles, receptors and neurons. Muscles

### 14.1 Mirrors Lenses Optical Instruments. Wavy Reflections. BIG Idea. Science Journal

BIG Idea Mirrors and lenses form images by causing light rays to change direction. 14.1 Mirrors MAIN Idea Light rays change direction when they are reflected by a mirror. 14.2 Lenses MAIN Idea Light rays

### Chapter 23. Mirrors and Lenses

Chapter 23 Mirrors and Lenses Mirrors and Lenses The development of mirrors and lenses aided the progress of science. It led to the microscopes and telescopes. Allowed the study of objects from microbes

### Light and Applications of Optics

UNIT 4 Light and Applications of Optics Topic 4.1: What is light and how is it produced? Topic 4.6: What are lenses and what are some of their applications? Topic 4.2 : How does light interact with objects

### 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

### THE TELESCOPE. PART 1: The Eye and Visual Acuity

THE TELESCOPE OBJECTIVE: As seen with the naked eye the heavens are a wonderfully fascinating place. With a little careful watching the brighter stars can be grouped into constellations and an order seen

### Reflection and Refraction of Light

Reflection and Refraction of Light Physics 102 28 March 2002 Lecture 6 28 Mar 2002 Physics 102 Lecture 6 1 Light waves and light rays Last time we showed: Time varying B fields E fields B fields to create

### 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

### 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

### 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

### EYE ANATOMY. Multimedia Health Education. Disclaimer

Disclaimer This movie is an educational resource only and should not be used to manage your health. The information in this presentation has been intended to help consumers understand the structure and