LIGHT. ENERGY FOR LIFE 2 Presented by- Ms.Priya
|
|
|
- Claude Chester Short
- 5 years ago
- Views:
Transcription
1 LIGHT ENERGY FOR LIFE 2 Presented by- Ms.Priya
2 VOCABULARY 1. Opaque 2. Transparent 3. Translucent 4. Refraction 5. Reflection 6. Ray 7. Image 8. Virtual image 9. Medium 10.Vacuum 11. Lens 12. Spectrum 13. Primary color 14. Secondary color 15. Complementary color 16. Pigment 17. Frequency 18. Wavelength 19. Diffraction 20. Mirage
3 Read Page 1-4 textbook Write 10 main points from that in your notebook.
4 LIGHT Light is radiant energy that is visible to the human eye, and is responsible for the sense of sight. There are many sources of light.
5
6 Light behaves as a WAVE and also as a PARTICLE. LIGHT
7
8 LIGHT Light is an electromagnetic radiation that can be detected by the human eye. Electromagnetic radiation waves is made of electric and magnetic fields, which can send energy from one location to another.
9 What is Light Made of? Light behaves like a wave. Each wave consists of two types of field, that is electric field and the magnetic field. (Electromagnetic wave) Light is a wave, made of magnetic and electric fields.
10 LIGHT Light is part of the electromagnetic spectrum, which ranges from radio waves to gamma rays. Visible light is a part of the electromagnetic spectrum that the human eye can detect visible waves.
11 HOMEWORK In the electromagnetic spectrum, which ranges from radio waves to gamma rays, find out how is each rays useful to us in life. Give examples for each.
12 HOW DOES LIGHT TRAVEL Light travels as a wave. This traveling of light in the form of waves is called as PROPAGATION OF LIGHT. Propagation of waves has both a speed and a direction, called the velocity. The velocity of light changes depends on the material it travels through. Light can travel through a vacuum a completely airless space. The fastest thing in the whole universe is the speed of light in a vacuum. In vacuum light always travels at the speed: c = 3.0 x 10 8 m/s
13
14 Wave of Light Light travels as waves of energy
15 Crest - The highest part of a wave. Trough -The lowest part of a wave. Wavelength - the distance between the top of one wave and the top of the next. Amplitude - is the height of a wave.
16 Wave of Light Light travels as waves of energy. Waves of light have different wavelengths. Different colors of light have different wavelengths.
17 What is frequency? Wave of Light Frequency is a measurement of how many cycles can happen in a certain amount of time, cycles per second. Hertz is the unit of frequency f is the frequency (hertz) T is period (seconds)
18 Example: Wave The period of a pendulum is 4.5s. Determine the frequency of this pendulum.
19 Example 1: Wave The period of a pendulum is 4.5s. Determine the frequency of this pendulum. Solution: The period means that it will take 4.5 seconds for the pendulum to swing back and forth once
20
21
22
23 LIGHT Light undergoes reflection and refraction.
24 REFLECTION
25 REFLECTION
26 Reflection A ray is a path that light travels through. Reflection is when a ray of light hits a plane mirror, the light ray bounce off the mirror. The incident ray is the ray of light that hits the mirror the reflected ray is the ray of light that bounces off the mirror.
27 REFLECTION
28 Law of Reflection The Law of Reflection states that angle of the incident light ray is equal to angle of the reflected light ray.
29 Reflection depends upon how smooth the surface is. If the surface is rough, the light scatters (spread out). If the surface is smooth, the light will bounce off at equal angles.
30 Types of reflection
31 Refraction Refraction occurs because light bends. When light moves from one substance to another it changes speed and direction. This change in direction is called REFRACTION.
32 Index of Refraction Index of refraction (n) is the measure of bending of a ray of light when passing from one material into another. n = c / v "n" is the index of refraction. "c" is the speed of light in a vacuum In vacuum the speed of light is c = x 10 m/s "v" is the speed of light in that substance 8
33 The index of refraction of some common materials are given below.
34 Index of Refraction The speed of light in an unknown medium is measured 8 to be 2.76 x 10 m/s. (a) What is the index of refraction of the medium? Solution: The index of refraction n = c/v 8 8 = ( x 10 m/s) / (2.76 x 10 m/s) = 1.09
35 Rainbows: Refraction of the Seven Colors Formation of rainbow is another example of REFRACTION A rainbow has seven colors because water droplets in the atmosphere break sunlight into seven colors. White light is made up of a full spectrum of colors. Each color has a different wavelength, and bends at a different angle.
36
37 Colors Objects don't "have" color, they give off light that "appears" to be a color. Objects appear one color or another because of how they reflect and absorb colors of light. Color is determined by frequency and by how those frequencies are combined or mixed when they reach the eye.
38 WHAT IS A LENS? A lens is a transparent curved piece of glass that is used to refract light. A lens is usually made from glass. There are two main types of lenses : convex lens : concave lens
39 LENS A lens changes the direction of light waves by refraction. It may form an image of an object. The image might be smaller or larger. Because a lens is curved, light rays strike different parts of its surface and are bent by different amounts. Depending on the lens shape, a beam (group of rays)of light either diverges (spreads out) or converges (concentrates).
40
41 LENS
42
43 What is a Concave Lens? A concave lens is thinner in the middle and thicker at the edges. It is also called a diverging lens. A concave lens will disperse light (spread out)light and make an image that is always virtual, upright and smaller than the object.
44 Concave Lens
45 Examples of concave lens A car's side mirror is one example of a concave lens. Nearsightedness means that someone can clearly see objects close to them, but objects farther away appear blurred(unclear). Concave lens is used to correct nearsightedness.
46 What is a Convex Lens? A convex lens is thicker in the middle and thinner at the edges. It is also called a converging lens. A convex lens will focus light and make an image. The image formed by a convex lens is real and inverted. But only in a magnifying glass the image will be virtual, upright and bigger than the object.
47 Convex Lens
48 Examples of convex lens Camera lenses are convex, as they focus all rays of light onto the object being photographed to make that object appear clear. A magnifying glass is another example of a convex lens; once the lens is placed close enough to the object, it will produce an upright, virtual image of the object.
49 CONVEX LENS Farsightedness means that someone can clearly see objects far away from them, but objects near to them appear blurred (unclear). Convex lens is used to correct farsightedness.
50
51 Difference between concave and convex lens
52
53 Lens Nearsightedness means that someone can clearly see objects close to them, but objects farther away appear blurry(unclear). Concave lens is used to correct nearsightedness. Farsightedness means that someone can clearly see objects far away from them, but objects near to them appear blurry. Convex lens is used to correct farsightedness.
Life Science Chapter 2 Study Guide
Key concepts and definitions Waves and the Electromagnetic Spectrum Wave Energy Medium Mechanical waves Amplitude Wavelength Frequency Speed Properties of Waves (pages 40-41) Trough Crest Hertz Electromagnetic
Science 8 Unit 2 Pack:
Science 8 Unit 2 Pack: Name Page 0 Section 4.1 : The Properties of Waves Pages By the end of section 4.1 you should be able to understand the following: Waves are disturbances that transmit energy from
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
LlIGHT REVIEW PART 2 DOWNLOAD, PRINT and submit for 100 points
WRITE ON SCANTRON WITH NUMBER 2 PENCIL DO NOT WRITE ON THIS TEST LlIGHT REVIEW PART 2 DOWNLOAD, PRINT and submit for 100 points Multiple Choice Identify the choice that best completes the statement or
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.
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
Lens: Lenses are usually made of and have 2 curved surfaces. Draw figure 5.23 on Page 191. Label it clearly and use a ruler for the light rays.
5.3 Lenses We have seen lenses in our microscopes, cameras or eyeglasses. Lens: Lenses are usually made of and have 2 curved surfaces. Concave lens: A lens curved inward Thinner at the centre than at the
Physics Learning Guide Name:
Physics Learning Guide Name: Instructions: Using a pencil, complete the following notes as you work through the related lessons. Show ALL work as is explained in the lessons. You are required to have this
Name: Date: Waves and Electromagnetic Spectrum, Sound Waves, and Light Waves Study Guide For Final
Name: Date: Waves and Electromagnetic Spectrum, Sound Waves, and Light Waves Study Guide For Final Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A disturbance
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
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
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
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
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](/thumbs/77/75013139.jpg "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
Name: Date: Block: Light Unit Study Guide Matching Match the correct definition to each term. 1. Waves
Name: Date: Block: Light Unit Study Guide Matching Match the correct definition to each term. 1. Waves 2. Medium 3. Mechanical waves 4. Longitudinal waves 5. Transverse waves 6. Frequency 7. Reflection
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
Where should the fisherman aim? The fish is not moving.
Where should the fisherman aim? The fish is not moving. When a wave hits a boundary it can Reflect Refract Reflect and Refract Be Absorbed Refraction The change in speed and direction of a wave Due to
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
Light sources can be natural or artificial (man-made)
Light The Sun is our major source of light Light sources can be natural or artificial (man-made) People and insects do not see the same type of light - people see visible light - insects see ultraviolet
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
Using Mirrors to Form Images
Using Mirrors to Form Images Textbook pages 182 189 Before You Read You stand in front of a. In what ways is your reflection the same as you? In what ways is your reflection different from you? Write your
Physical Science Test Form A Test 5: Waves. Matching. 1. diffraction
Physical Science Test Form A Test 5: Waves Matching. 1. diffraction 2. intensity 3. interference 4. mechanical wave 5. medium 6. pitch 7. reflection 8. refraction 9. translucent 10. transverse wave A.
Light. In this unit: 1) Electromagnetic Spectrum 2) Properties of Light 3) Reflection 4) Colors 5) Refraction
Light In this unit: 1) Electromagnetic Spectrum 2) Properties of Light 3) Reflection 4) Colors 5) Refraction Part 1 Electromagnetic Spectrum and Visible Light Remember radio waves are long and gamma rays
SCI-PS Light and Optics Pre Assessment Exam not valid for Paper Pencil Test Sessions
SCI-PS Light and Optics Pre Assessment Exam not valid for Paper Pencil Test Sessions [Exam ID:1TL2E1 1 If the angle of incidence is 45, what is the angle of reflection? A 120 B 50 C 90 D 45 2 The wave
ID: A. Optics Review Package Answer Section TRUE/FALSE
Optics Review Package Answer Section TRUE/FALSE 1. T 2. F Reflection occurs when light bounces off a surface Refraction is the bending of light as it travels from one medium to another. 3. T 4. F 5. T
Science Focus 8. Light and Optical Systems. Pop Quiz Master (5 questions) for each Topic A C B D C C B C C A D B C A B B C C A C A C D B A C B B C D
Science Focus 8 Pop Quiz Master (5 questions) for each Topic Light and Optical Systems Answer Key Science Focus 8 Questions Topics 1. 2. 3. 4. 5. Topic 1 - What is Light? A C B D C Topic 2 Reflection C
Unit 3: Energy On the Move
14 14 Table of Contents Unit 3: Energy On the Move Chapter 14: Mirrors and Lenses 14.1: Mirrors 14.2: Lenses 14.3: Optical Instruments 14.1 Mirrors How do you use light to see? When light travels from
UNIT 12 LIGHT and OPTICS
UNIT 12 LIGHT and OPTICS What is light? Light is simply a name for a range of electromagnetic radiation that can be detected by the human eye. What characteristic does light have? Light is electromagnetic
Unit 2: Optics Part 2
Unit 2: Optics Part 2 Refraction of Visible Light 1. Bent-stick effect: When light passes from one medium to another (for example, when a beam of light passes through air and into water, or vice versa),
Optics looks at the properties and behaviour of light!
Optics looks at the properties and behaviour of light! Chapter 4: Wave Model of Light Past Theories Pythagoras believed that light consisted of beams made up of tiny particles that carried information
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
Light Energy. By: Genevieve Rickey 5th Grade Mrs. Branin 2016
Light Energy By: Genevieve Rickey 5th Grade Mrs. Branin 2016 Everyone has probably turned on a light before, but have you ever thought about what light is? Light is a form of energy that is reflected from
Topic 1 - What is Light? 1. Radiation is the type of energy transfer which does not require... A matter B heat C waves D light
Grade 8 Unit 1 Test Student Class Topic 1 - What is Light? 1. Radiation is the type of energy transfer which does not require... A matter B heat C waves D light 2. Light-producing technologies, such as
Table of Contents. Chapter x 2 Using Light. Chapter Preview. 2.1 Waves and the Electromagnetic Spectrum. 2.2 Visible Light and Color
Table of Contents Chapter Preview 2.1 Waves and the Electromagnetic Spectrum 2.2 Visible Light and Color 2.3 Reflection and Refraction 2.4 Seeing Light 2.5 Optical Tools Chapter Preview Questions 1. What
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
Waves Mechanical vs. Electromagnetic Mechanical Electromagnetic Transverse vs. Longitudinal Behavior of Light
PSC1341 Chapter 4 Waves Chapter 4: Wave Motion A.. The Behavior of Light B. The E-M spectrum C. Equations D. Reflection, Refraction, Lenses and Diffraction E. Constructive Interference, Destructive Interference
sclera pupil What happens to light that enters the eye?
Human Vision Textbook pages 202 215 Before You Read Some people can see things clearly from a great distance. Other people can see things clearly only when they are nearby. Why might this be? Write your
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,
Fill in the blanks. Reading Skill: Compare and Contrast - questions 3, 17
Light and Color Lesson 9 Fill in the blanks Reading Skill: Compare and Contrast - questions 3, 17 How Do You Get Color From White Light? 1 A(n) is a triangular piece of polished glass that refracts white
General Physics II. Ray Optics
General Physics II Ray Optics 1 Dispersion White light is a combination of all the wavelengths of the visible part of the electromagnetic spectrum. Red light has the longest wavelengths and violet light
Preview. Light and Reflection Section 1. Section 1 Characteristics of Light. Section 2 Flat Mirrors. Section 3 Curved Mirrors
Light and Reflection Section 1 Preview Section 1 Characteristics of Light Section 2 Flat Mirrors Section 3 Curved Mirrors Section 4 Color and Polarization Light and Reflection Section 1 TEKS The student
Preview of Period 2: Electromagnetic Waves Radiant Energy I
Preview of Period 2: Electromagnetic Waves Radiant Energy I 2.1 Energy Transmitted by Waves How can waves transmit energy? 2.2 Refraction of Radiant Energy What happens when a light beam travels through
Optics Review (Chapters 11, 12, 13)
Optics Review (Chapters 11, 12, 13) Complete the following questions in preparation for your test on FRIDAY. The notes that you need are in italics. Try to answer it on your own first, then check with
Block 3: Physics of Waves. Chapter 12: Sound. Relate pitch and loudness to frequency and amplitude Describe how sound travels
Chapter 12: Sound Describe production of sounds Measure the speed of sound Relate pitch and loudness to frequency and amplitude Describe how sound travels Sound is a longitudinal (compression) wave Sound
An object that refracts light. A from of energy that travels in waves and can be seen when it interacts with matter
Science Study Guide Light, Chapter 9 Fourth Grade Vocabulary Definition Absorb To take in Lens An object that refracts light Example Light A from of energy that travels in waves and can be seen when it
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
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.
II. Types of Waves A. Transverse waves 1. Can travel with or without matter (medium)
SOL: PS. 8 & 9 I. Waves A. Definitionà a disturbance that transfers energy through matter or space II. Types of Waves A. Transverse waves 1. Can travel with or without matter (medium) 2. Moves at rt. angles
1. Draw the Ray Diagram, name lens or mirror shown and determine the SALT for each picture
Honors Physics Chapter 22 and 23 Test Name: 1. Draw the Ray Diagram, name lens or mirror shown and determine the SALT for each picture 2. Type of Mirror above: i. SALT of image: S: A: L: T: b. Type of
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
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
Optics Review. 2. List the different types of Light/EM Radiation in order of increasing wavelength.
Optics Review 1. Match the vocabulary words from Column 1 with the choices in Column 2. Column 1 Vocabulary Words Column 2 Choices 1. incandescence A. production of light by friction 2. chemiluminescence
Name Class Date. Use the terms from the following list to complete the sentences below. Each term may be used only once. Some terms may not be used.
Assessment Chapter Test B Light and Our World USING KEY TERMS Use the terms from the following list to complete the sentences below. Each term may be used only once. Some terms may not be used. concave
Unit 3: Chapter 6. Refraction
Unit 3: Chapter 6 Refraction Refraction of Visible Light 2 Examples: 1. Bent-stick effect: When light passes from one medium to another (ex: from air into water), the change of speed causes it to change
Term Info Picture. A wave that has both electric and magnetic fields. They travel through empty space (a vacuum).
Waves S8P4. Obtain, evaluate, and communicate information to support the claim that electromagnetic (light) waves behave differently than mechanical (sound) waves. A. Ask questions to develop explanations
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 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
Different Mirror Surfaces
DATE: NAME: CLASS: CHAPTER 5 BLM 2-18 Different Mirror Surfaces Goal Show your understanding of the kinds of mirrors used for different purposes. What to Do Identify the type of mirror (plane, convex,
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
Physics Unit 5 Waves Light & Sound
Physics Unit 5 Waves Light & Sound Wave A rhythmic disturbance that transfers energy through matter and/or a vacuum Material a wave travels through is called the medium 2 types of waves: 1. Transverse
Optics and Images. Lenses and Mirrors. Matthew W. Milligan
Optics and Images Lenses and Mirrors Light: Interference and Optics I. Light as a Wave - wave basics review - electromagnetic radiation II. Diffraction and Interference - diffraction, Huygen s principle
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
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
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
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
Physical Science Physics
Name Physical Science Physics C/By Due Date Code Period Earned Points PSP 5W4 Seeing Problems (divide by 11) Multiple Choice Identify the letter of the choice that best completes the statement or answers
Reflection! Reflection and Virtual Image!
1/30/14 Reflection - wave hits non-absorptive surface surface of a smooth water pool - incident vs. reflected wave law of reflection - concept for all electromagnetic waves - wave theory: reflected back
1. The convex lens will magnify the print, provided the object is not placed beyond 2F, While the concave lens will shrink the print image.
1 P a g e Grade 8 SCIENCE CHATER 6 QUESTIONS 6.1 A page 215 What Did You Find Out? Answers 1. The convex lens will magnify the print, provided the object is not placed beyond 2F, While the concave lens
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
Reflection and Color
CHAPTER 16 13 SECTION Sound and Light Reflection and Color KEY IDEAS As you read this section, keep these questions in mind: What happens to light when it hits an object? Why can you see an image in a?
Chapter 13- Refraction and Lenses
hapter 13- Refraction and Lenses We have already established that light is an electromagnetic wave, so it does not require a medium to travel through. However, we know from the personal experience of being
Table of Contents Chapter Preview
Table of Contents Preview 2.1 Waves and the Electromagnetic Spectrum 2.2 Visible Light and Color 2.3 Reflection and Refraction 2.4 Seeing Light 2.5 Optical Tools Preview Questions 1. What causes a building
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
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
A. Amplitude B. Frequency C. Wavelength
WAVES Frequency, wavelength, amplitude and electromagnetic spectrum STUDENT BOOK Ch. 4, pp. 92 99 1. For each group of two statements, circle the one that is correct. a) All waves transport energy from
National 3 Physics Waves and Radiation. 1. Wave Properties
1. Wave Properties What is a wave? Waves are a way of transporting energy from one place to another. They do this through some form of vibration. We see waves all the time, for example, ripples on a pond
Electromagnetic Waves
Electromagnetic Waves What is an Electromagnetic Wave? An EM Wave is a disturbance that transfers energy through a field. A field is a area around an object where the object can apply a force on another
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
X rays X-ray properties Denser material = more absorption = looks lighter on the x-ray photo X-rays CT Scans circle cross-sectional images Tumours
X rays X-ray properties X-rays are part of the electromagnetic spectrum. X-rays have a wavelength of the same order of magnitude as the diameter of an atom. X-rays are ionising. Different materials absorb
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
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
Vocabulary & Concepts. retina cornea pupil lens iris optic nerve ciliary muscles aqueous humour vitreous humour
Chapter 3 3.0 Human Eye P. 252-255 BC Science Connections Vocabulary & Concepts retina cornea pupil lens iris optic nerve ciliary muscles aqueous humour sclera vitreous humour Parts of the Eye Here s a
Chapter Introduction. Chapter Wrap-Up. and the Eye
Chapter Introduction Lesson 1 Lesson 2 Lesson 3 Sound Light Chapter Wrap-Up Mirrors, Lenses, and the Eye How do sound and light waves travel and interact with matter? What do you think? Before you begin,
Light: Reflection and Refraction Light Reflection of Light by Plane Mirror Reflection of Light by Spherical Mirror Formation of Image by Mirror Sign Convention & Mirror Formula Refraction of light Through
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
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,
Physics Test Review Reflection/Refraction/Diffraction & Lenses Session: Name:
Multiple Choice 1. The law of reflection says that a. the angle of reflection from a mirror equals the angle of incidence. b. waves incident on a mirror are partially reflected. c. all waves incident on
Section Electromagnetic Waves and the Electromagnetic Spectrum
Section 17.6 Electromagnetic Waves and the Electromagnetic Spectrum Electromagnetic Waves Can you name all the colors of the rainbow? Red, Orange, Yellow, Green, Blue, Indigo, Violet Electromagnetic Waves
Optics & Light. See What I m Talking About. Grade 8 - Science OPTICS - GRADE 8 SCIENCE 1
Optics & Light See What I m Talking About Grade 8 - Science OPTICS - GRADE 8 SCIENCE 1 Overview In this cluster, students broaden their understanding of how light is produced, transmitted, and detected.
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
Longitudinal No, Mechanical wave ~340 m/s (in air) 1,100 feet per second More elastic/denser medium = Greater speed of sound
Type of wave Travel in Vacuum? Speed Speed vs. Medium Light Sound vs. Sound Longitudinal No, Mechanical wave ~340 m/s (in air) 1,100 feet per second More elastic/denser medium = Greater speed of sound
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
Waves. A wave is a disturbance which travels through a vacuum or medium (air, water, etc) that contains matter A wave transports ENERGY not matter
Waves and Optics Waves A wave is a disturbance which travels through a vacuum or medium (air, water, etc) that contains matter A wave transports ENERGY not matter Waves Some waves do not need a medium
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
AQA P3 Topic 1. Medical applications of Physics
AQA P3 Topic 1 Medical applications of Physics X rays X-ray properties X-rays are part of the electromagnetic spectrum. X-rays have a wavelength of the same order of magnitude as the diameter of an atom.
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?
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
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
PHYSICS OPTICS. Mr Rishi Gopie
OPTICS Mr Rishi Gopie Ray Optics II Images formed by lens maybe real or virtual and may have different characteristics and locations that depend on: i) The type of lens involved, whether converging or
19. Ray Optics. S. G. Rajeev. April 2, 2009
9. Ray Optics S. G. Rajeev April 2, 2009 When the wave length is small light travels along straightlines called rays. Ray optics (also called geometrical optics) is the study of this light in this situation.