Refraction of Light. Refraction of Light

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Refraction of Light. Refraction of Light"

Transcription

1 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 coin just disappears from your sight. Ask your friend to slowly pour water into the cup. Does the coin come back into sight? Why does this happen? Activity: Refraction of light in glass Place your glass in the middle of a piece of plain paper and sketch its outline with a pencil. Remove the glass and draw a normal line about 1 cm from the end of the glass as illustrated below. Draw an arrow 30 from the normal. Put a piece of cardboard underneath your plain paper. Place a pin at each end of the line you just drew. Carefully place your glass on the square you just drew. Kneel down and view the two pins through the glass. While looking through the glass, move your eyes from left to right until the two pins appear to line up. Place a pin near the edge of the glass to mark where the pins line up. Look through the glass again and place a 4 th pin so it lines up with the way the other three pins appear through the glass. Remove all the pins and connect the pinhole dots with a pencil. Repeat the experiment using an angle of incidence of 45. Sr. No. Angle of incidence (i) Angle of refraction (r) Questions: What direction were the straight light rays bent as they moved from the air (outside the block) into glass block?

2 2 What direction did the straight light rays bend as they moved from inside the glass block back into air? Rules of Refraction Why does light bend when it travels from one medium to another? Define the term refractive index.

3 3 What is optical density? Checkpoint Consider the diagram at the right in answering the next two questions. 1. Light must travel in medium 1 compared to medium Light must travel in medium 2 compared to medium 3. Arthur's method of fishing involves spearing the fish while standing on the shore. Because of the refraction of light, the observed location of the fish is different than its actual location. If Arthur is to successfully spear the fish, must he aim at, below, or above where the fish appears to be? Explain.

4 4 Activity: Image formation in convex lens Place an object before a convex lens for each of the following object positions shown below and obtain its image. Measure the distance of the image from the mirror. Note the location, orientation (upright or inverted), relative size (larger or smaller than object), and the type of image (real or virtual) for each condition. Draw ray diagrams for each condition and verify the results observed by you. Case 1: Object is located at infinity. Case 2: Object is located beyond the center of curvature. Case 3: Object is located at the center of curvature.

5 5 Case 4: Object is located between the center of curvature and focal point. Case 5: Object is located at the focal point. Case 6: Object is located at between the focal point and the lens.

6 6 Activity: Image formation in concave lens Place an object before a concave lens for each of the following object positions shown below and obtain its image. Measure the distance of the image from the mirror. Note the location, orientation (upright or inverted), relative size (larger or smaller than object), and the type of image (real or virtual) for each condition. Draw ray diagrams for each condition and verify the results observed by you. Case 1: Object is located at infinity. Case 2: Object is located beyond the center of curvature. Lens formula, magnification and power of a lens = distance of the image from the mirror. = distance of the object from the mirror. = focal length of the mirror. Power of lens = Diopter Net power of n lens placed in contact =

7 7 Checkpoint One half of a convex lens is covered with a black paper. Will this lens produce a complete image of the object? Verify your answer experimentally. Explain your observations. A spherical mirror and a thin spherical lens have each a focal length of 15 cm. The mirror and the lens are likely to be 1. both are concave 2. both are convex 3. the mirror is concave and the lens is convex 4. the mirror is convex and but the lens is concave

8 8 Questions and Problems 1. A concave lens of focal length 15 cm forms an image 10 cm from the lens. How far is the object placed from the lens? 2. An object 5 cm in length is held 25 cm away from a converging lens of focal length 10 cm. Draw the ray diagram and find the position, size and the nature of the image formed. 3. An object of 5 cm is placed at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find the position, nature and size of the image.

9 9 Human Eye Key parts of the eye 1. Pupil 2. Iris 3. Lens 4. Retina 5. Optic Nerve Blind spot Hold the worksheet about 20 inches away. With your right eye, look at the dot. Slowly bring the image (or move your head) closer while looking at the dot. At a certain distance, the + will disappear from sight. Why does this happen? How do we see in 3D?

10 10 Rods and Cones The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. There are 2 types of photoreceptors in the retina: rods and cones. The rods are most sensitive to light and dark changes, shape and movement and contain only one type of light-sensitive pigment. Rods are not good for color vision. In a dim room, however, we use mainly our rods, but we are "color blind." Rods are more numerous than cones in the periphery of the retina. Next time you want to see a dim star at night, try to look at it with your peripheral vision and use your ROD VISION to see the dim star. There are about 120 million rods in the human retina. The cones are not as sensitive to light as the rods. However, cones are most sensitive to one of three different colors (green, red or blue). Signals from the cones are sent to the brain which then translates these messages into the perception of color. Cones, however, work only in bright light. That's why you cannot see color very well in dark places. So, the cones are used for color vision and are better suited for detecting fine details. There are about 6 million cones in the human retina. Some people cannot tell some colors from others - these people are "color blind." Someone who is color blind does not have a particular type of cone in the retina or one type of cone may be weak.

11 11 What is 20/20 vision? Power of accommodation Near point Far point Defects of vision and their correction Myopia Image is formed in front of the retina. Far point is nearer than infinity. Suggest a method to correct myopia.

12 12 Hyperopia (Hypermetropia) Image is formed in behind the retina. Near point is beyond than normal near point (about 25 cm). Suggest a method to correct hyperopia. Dispersion of light Activity: Dispersion of light from a prism 1. Locate the bright sun in the sky preferably in the early morning or late afternoon where it is lower in the sky and almost horizontal rays are obtained The sun is a good source of light for illustrating dispersion because the rays are parallel and each ray strikes the prism at the same angle. 3. Place the prism on the template as shown so that the light beam enters one side of the prism and exits the opposite side and refracts through the largest possible angle. 4. Place a vertical white screen about 50 cm to 100 cm behind the prism such that the sunlight beam strikes the screen after passing through the prism. You need some distance to allow the colors to spread out. 5. Slowly rotate the prism until you are able to observe a bright spectrum of light on the screen. 6. Record the colors you see from top (pointed end of prism) to bottom and look up the wavelength of each color in nanometers. Color Red Orange Yellow Green Blue Indigo Violet Wavelength in nanometers

13 13 Explain why the light has to be parallel to observe a colorful spectrum. Checkpoint Explain the formation of a rainbow. What conditions are necessary to see a rainbow? Why does the sky appear blue? How would it appear from space? What is the color of the sun? Why is the sun red in color when there is sunrise or sunset?

Refraction, Lenses, and Prisms

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

More information

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 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.

More information

HUMAN EYE AND COLOURFUL WORLD

HUMAN EYE AND COLOURFUL WORLD HUMAN EYE AND COLOURFUL WORLD VERY SHORT ANSWER TYPE QUESTIONS [1 Mark] 1. Which phenomenon is responsible for making the path of light visible? Answer. Tyndall effect. 2. State one function of iris in

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

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

HUMAN EYE AND COLOURFUL WORLD Notes Physics - Grade 10

HUMAN EYE AND COLOURFUL WORLD Notes Physics - Grade 10 HUMAN EYE AND COLOURFUL WORLD Notes Physics - Grade 10 Human Eye Eye is one of the most sensitive sense organs in the human body. Our eye enables us to see this beautiful world. It consists of a lens,

More information

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] 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

More information

Person s Optics Test KEY SSSS

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

More information

Chapter: Sound and Light

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

More information

BASANT S PHYSICS STUDY MATERIAL SUB- HUMAN EYE AND COLOURFUL WORLD =================================================== ============

BASANT S PHYSICS STUDY MATERIAL SUB- HUMAN EYE AND COLOURFUL WORLD =================================================== ============ BASANT S PHYSICS Mob: 9777702608 STUDY MATERIAL SUB- HUMAN EYE AND COLOURFUL WORLD =================================================== ============ Very Short Answer Type Questions 1. What is the least

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

Chapter 23. Mirrors and Lenses

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

More information

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

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.

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

Human Eye Model OS-8477A

Human Eye Model OS-8477A Instruction Manual 02-3032A Human Eye Model OS-8477A 800-772-8700 www.pasco.com Table of Contents Contents Quick Start............................................................ Introduction...........................................................

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

Chapter 20 Human Vision

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

More information

Image Formation by Lenses

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

More information

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

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

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

OPTICS DIVISION B. School/#: Names:

OPTICS DIVISION B. School/#: Names: OPTICS DIVISION B School/#: Names: Directions: Fill in your response for each question in the space provided. All questions are worth two points. Multiple Choice (2 points each question) 1. Which of the

More information

Image formation. Types of Images

Image formation. Types of Images Image formation A. Karle Physics 202 Nov. 27, 2007 Chapter 36 Mirrors Images Ray diagrams Lenses As usual, these notes are only a complement to the notes on the whiteboard. Types of Images A real image

More information

Section 1: Sound. Sound and Light Section 1

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

More information

Aspects of Vision. Senses

Aspects of Vision. Senses Lab is modified from Meehan (1998) and a Science Kit lab 66688 50. Vision is the act of seeing; vision involves the transmission of the physical properties of an object from an object, through the eye,

More information

Basic Optics System OS-8515C

Basic Optics System OS-8515C 40 50 30 60 20 70 10 80 0 90 80 10 20 70 T 30 60 40 50 50 40 60 30 70 20 80 90 90 80 BASIC OPTICS RAY TABLE 10 0 10 70 20 60 50 40 30 Instruction Manual with Experiment Guide and Teachers Notes 012-09900B

More information

Practice Problems for Chapter 25-26

Practice Problems for Chapter 25-26 Practice Problems for Chapter 25-26 1. What are coherent waves? 2. Describe diffraction grating 3. What are interference fringes? 4. What does monochromatic light mean? 5. What does the Rayleigh Criterion

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

Laboratory 12: Image Formation by Lenses

Laboratory 12: Image Formation by Lenses Phys 112L Spring 2013 Laboratory 12: Image Formation by Lenses The process by which convex lenses produce images can be described with reference to the scenario illustrated in Fig. 1. An object is placed

More information

Division C Optics KEY Captains Exchange

Division C Optics KEY Captains Exchange Division C Optics KEY 2017-2018 Captains Exchange 1.) If a laser beam is reflected off a mirror lying on a table and bounces off a nearby wall at a 30 degree angle, what was the angle of incidence of the

More information

Human Retina. Sharp Spot: Fovea Blind Spot: Optic Nerve

Human Retina. Sharp Spot: Fovea Blind Spot: Optic Nerve I am Watching YOU!! Human Retina Sharp Spot: Fovea Blind Spot: Optic Nerve Human Vision Optical Antennae: Rods & Cones Rods: Intensity Cones: Color Energy of Light 6 10 ev 10 ev 4 1 2eV 40eV KeV MeV Energy

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

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

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 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

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

mirrors and lenses PHY232 Remco Zegers Room W109 cyclotron building

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

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

Refraction Phenomena Apparent Depth & Volume

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

More information

PHYS:1200 LECTURE 31 LIGHT AND OPTICS (3)

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

More information

Chapter 23. Light Geometric Optics

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

More information

Light and Color Page 1 LIGHT AND COLOR Appendix

Light and Color Page 1 LIGHT AND COLOR Appendix Light and Color Page 1 LIGHT AND COLOR The Light Around Us 2 Transparent, Translucent and Opaque 3 Images 4 Pinhole Viewer 5 Pinhole "Camera" 6 The One That Got Away 7 Find the Coin 8 Cut a Pencil with

More information

Chapter 34. Images. Copyright 2014 John Wiley & Sons, Inc. All rights reserved.

Chapter 34. Images. Copyright 2014 John Wiley & Sons, Inc. All rights reserved. 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

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

Wonders of Light - Part I

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.

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

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

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

More information

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

Lecture Outline Chapter 27. Physics, 4 th Edition James S. Walker. Copyright 2010 Pearson Education, Inc. Lecture Outline Chapter 27 Physics, 4 th Edition James S. Walker Chapter 27 Optical Instruments Units of Chapter 27 The Human Eye and the Camera Lenses in Combination and Corrective Optics The Magnifying

More information

UNIT SUMMARY: Electromagnetic Spectrum, Color, & Light Name: Date:

UNIT SUMMARY: Electromagnetic Spectrum, Color, & Light Name: Date: UNIT SUMMARY: Electromagnetic Spectrum, Color, & Light Name: Date: Topics covered in the unit: 1. Electromagnetic Spectrum a. Order of classifications and respective wavelengths b. requency, wavelength,

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

Physics for Kids. Science of Light. What is light made of?

Physics for Kids. Science of Light. What is light made of? Physics for Kids Science of Light What is light made of? This is not an easy question. Light has no mass and is not really considered matter. So does it even exist? Of course it does! We couldn't live

More information

Using Mirrors to Form Images. Reflections of Reflections. Key Terms. Find Out ACTIVITY

Using Mirrors to Form Images. Reflections of Reflections. Key Terms. Find Out ACTIVITY 5.2 Using Mirrors to Form Images All mirrors reflect light according to the law of reflection. Plane mirrors form an image that is upright and appears to be as far behind the mirror as the is in front

More information

Sense Organs (Eye) The eye is the sense organ of sight. The eye is shaped like a ball and is located in bony

Sense Organs (Eye) The eye is the sense organ of sight. The eye is shaped like a ball and is located in bony Sense Organs (Eye) The eye is the sense organ of sight. The eye is shaped like a ball and is located in bony sockets in the skull. It is held in place by six muscles which are joined to the outside of

More information

LO - Lab #06 - The Amazing Human Eye

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

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

November 14, 2017 Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes 2- lacrimal apparatus:

November 14, 2017 Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes 2- lacrimal apparatus: Vision: photoreceptor cells in eye 3 grps of accessory organs 1-eyebrows, eyelids, & eyelashes eyebrows: protection from debris & sun eyelids: continuation of skin, protection & lubrication eyelashes:

More information

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

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 =

More information

HW- Finish your vision book!

HW- Finish your vision book! March 1 Table of Contents: 77. March 1 & 2 78. Vision Book Agenda: 1. Daily Sheet 2. Vision Notes and Discussion 3. Work on vision book! EQ- How does vision work? Do Now 1.Find your Vision Sensation fill-in-theblanks

More information

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 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

More information

Photography (cont d)

Photography (cont d) Lecture 13 Ch. 4 Photography continued Ch. 5 The Eye Feb. 23, 2010 Exams will be back on Feb. 25 Homework 5 is due Feb. 25 Read all of Ch. 5. on The Eye. 1 Photography (cont d) Polarizing and haze filters

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

The Eye and Vision. Activities: Linda Shore, Ed.D. Exploratorium Teacher Institute Exploratorium, all rights reserved

The Eye and Vision. Activities: Linda Shore, Ed.D. Exploratorium Teacher Institute Exploratorium, all rights reserved The Eye and Vision By Linda S. Shore, Ed.D. Director,, San Francisco, California, United States lindas@exploratorium.edu Activities: Film Can Eyeglasses a pinhole can help you see better Vessels using

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

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 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

More information

MIRRORS - INTRODUCTION

MIRRORS - INTRODUCTION 1 2 3 4-5 6 7 8-9 10 11 12-17 18 19 20 CONTENTS LIGHT - INTRODUCTION REFLECTION MIRRORS - INTRODUCTION MIRRORS A PERISCOPE REFLECTION - SURFACES CONCAVE AND CONVEX MIRRORS REFRACTION A MIRAGE LENSES THE

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

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

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

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

Chapter 34: Geometrical Optics (Part 2)

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

More information

KS3 Science. Light and Sound

KS3 Science. Light and Sound KS3 Science Light and Sound Light and Sound Key Words Write a definition for each of the key words listed below Key words Frequency Wavelength Amplitude Reflection Refraction Dispersion Light Spectrum

More information

THE TELESCOPE. PART 1: The Eye and Visual Acuity

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

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

Table of Contents DSM II. Lenses and Mirrors (Grades 5 6) Place your order by calling us toll-free

Table of Contents DSM II. Lenses and Mirrors (Grades 5 6) Place your order by calling us toll-free DSM II Lenses and Mirrors (Grades 5 6) Table of Contents Actual page size: 8.5" x 11" Philosophy and Structure Overview 1 Overview Chart 2 Materials List 3 Schedule of Activities 4 Preparing for the Activities

More information

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

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,

More information

BIOPHYSICS OF VISION GEOMETRIC OPTICS OF HUMAN EYE. Refraction media of the human eye. D eye = 63 diopter, D cornea =40, D lens = 15+

BIOPHYSICS OF VISION GEOMETRIC OPTICS OF HUMAN EYE. Refraction media of the human eye. D eye = 63 diopter, D cornea =40, D lens = 15+ BIOPHYSICS OF VISION THEORY OF COLOR VISION ELECTRORETINOGRAM Two problems: All cows are black in dark! Playing tennis in dark with illuminated lines, rackets, net, and ball! Refraction media of the human

More information

H-'li+i Lensmaker's Equation. Summary / =

H-'li+i Lensmaker's Equation. Summary / = Lensmaker's equation *! 23-10 Lensmaker's Equation A useful equation, known as the lensmaker's equation, relates the focal length of a lens to the radii of curvature Rx and R2 of its two surfaces and its

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

Home Lab 5 Refraction of Light

Home Lab 5 Refraction of Light 1 Home Lab 5 Refraction of Light Overview: In previous experiments we learned that when light falls on certain materials some of the light is reflected back. In many materials, such as glass, plastic,

More information

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

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

More information

EYE ANATOMY. Multimedia Health Education. Disclaimer

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

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

Chapter 23. Light: Geometric Optics

Chapter 23. Light: Geometric Optics Ch-23-1 Chapter 23 Light: Geometric Optics Questions 1. Archimedes is said to have burned the whole Roman fleet in the harbor of Syracuse, Italy, by focusing the rays of the Sun with a huge spherical mirror.

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

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

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

More information

Exemplar for Internal Achievement Standard Level 2

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

More information

Vision. By: Karen, Jaqui, and Jen

Vision. By: Karen, Jaqui, and Jen Vision By: Karen, Jaqui, and Jen Activity: Directions: Stare at the black dot in the center of the picture don't look at anything else but the black dot. When we switch the picture you can look around

More information

Sensation. What is Sensation, Perception, and Cognition. All sensory systems operate the same, they only use different mechanisms

Sensation. What is Sensation, Perception, and Cognition. All sensory systems operate the same, they only use different mechanisms Sensation All sensory systems operate the same, they only use different mechanisms 1. Have a physical stimulus (e.g., light) 2. The stimulus emits some sort of energy 3. Energy activates some sort of receptor

More information

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

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.

More information

Exam 4--PHYS 102--S15

Exam 4--PHYS 102--S15 Name: Class: Date: Exam 4--PHYS 02--S5 Multiple Choice Identify the choice that best completes the statement or answers the question.. A mirror produces an upright image. The object is 8 cm high and to

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

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! 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!

More information

VISUAL PHYSICS ONLINE DEPTH STUDY: ELECTRON MICROSCOPES

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

More information

CS 443: Imaging and Multimedia Cameras and Lenses

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.

More information

Physics 1520, Spring 2013 Quiz 2, Form: A

Physics 1520, Spring 2013 Quiz 2, Form: A Physics 1520, Spring 2013 Quiz 2, Form: A Name: Date: Section 1. Exercises 1. The index of refraction of a certain type of glass for red light is 1.52. For violet light, it is 1.54. Which color of light,

More information

Wonderlab The Statoil Gallery

Wonderlab The Statoil Gallery Wonderlab The Statoil Gallery and maths s Age (s) Topic 7 11 LIGHT INFORMATION 11-14 Location WONDERLAB: THE STATOIL GALLERY LEVEL 3, SCIENCE MUSEUM LONDON 1 What s the science? What more will you wonder?

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

Chapter 9: Light, Colour and Radiant Energy. Passed a beam of white light through a prism.

Chapter 9: Light, Colour and Radiant Energy. Passed a beam of white light through a prism. Chapter 9: Light, Colour and Radiant Energy Where is the colour in sunlight? In the 17 th century (1600 s), Sir Isaac Newton conducted a famous experiment. Passed a beam of white light through a prism.

More information

Chapter 23 Study Questions Name: Class:

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

More information

Retina. Convergence. Early visual processing: retina & LGN. Visual Photoreptors: rods and cones. Visual Photoreptors: rods and cones.

Retina. Convergence. Early visual processing: retina & LGN. Visual Photoreptors: rods and cones. Visual Photoreptors: rods and cones. Announcements 1 st exam (next Thursday): Multiple choice (about 22), short answer and short essay don t list everything you know for the essay questions Book vs. lectures know bold terms for things that

More information

Light, Mirrors, and Lenses

Light, Mirrors, and Lenses Light waves can be absorbed, reflected, and transmitted by matter. Light, Mirrors, and Lenses SECTION 1 Properties of Light Main Idea A source of light gives off light rays that travel outward in all directions.

More information

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

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

More information