is10_sb_unit_d

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10.3 CHECK and REFLECT Key Concept Review 1. What is the ray model of light? 2. Draw a simple ray diagram of light rays travelling out from a light bulb. 3. What are two properties of light that you can show using a ray diagram? 4. What three things can happen when light strikes an object? 5. Use a labelled ray diagram to show the difference between transparent, translucent, and opaque objects. 6. What determines how light rays behave when they strike an object? 7. Describe how a penumbra differs from an umbra, using the ray model of light. 8. (a) What is the difference between regular reflection and diffuse reflection? (b) Give an example of each type of reflection. 9. Look at the photograph of the water below. What is the best description of the property of this water: opaque, transparent, or translucent? Explain your answer. Question 9 10. Use the ray model of light to show light as it approaches, passes through, and is reflected off a glass surface. Connect Your Understanding 11. A basketball does not give off light. Explain with the aid of a ray diagram how you are able to see a basketball. 12. Explain why a piece of metal would make a better reflector than a piece of wood. 13. Explain, with the help of ray diagrams, why the shadow created by your hand on a wall grows larger when you move your hand toward the light source. 14. Under what conditions can a transparent material become translucent or even opaque? 15. A spotlight shines on an actor on a stage. Describe the type of shadow the actor is likely to cast. 16. Explain why you agree or disagree with the following statement: No object is perfectly transparent or perfectly opaque. 17. In terms of subtractive light theory, explain why some objects are considered opaque. 18. One style of solar collector panel for domestic hot water consists of a sheet of glass on top, a sheet of black painted metal on the bottom, and water flowing between. Describe the steps of what happens to sunlight striking such a panel. Reflection 19. Why do you think it is important in your life to understand how light interacts with matter? For more questions, go to ScienceSource. Light is part of the electromagnetic spectrum and travels in waves. 409
Investigating 410 UNIT D Light and Geometric Optics CAREERS in Science Great CANADIANS in Science Willard S. Boyle Figure 10.51 Willard S. Boyle Digital cameras and camcorders are very common in our modern world but if it had not been for the invention of the charge-coupled device (CCD), they might not exist today. You can find a CCD in a wide range of imaging products, such as camcorders, cellphone cameras, telescopes, and imaging satellites. If you compare a camera to a human eye, then the CCD is like the retina at the back of the eye that turns the image focussed onto its surface into a digital picture. CCDs work by converting light, X-rays, ultraviolet rays, or infrared waves into a pattern of electric charges on a silicon chip. The charges are then converted into an image file, doing away with a need for film. Today, a less expensive technology replaces the CCD in most consumer electronics, but in devices where the very best picture is needed, like astronomical telescopes, CCDs are used (Figure 10.52). The CCD was invented in 1969 at Bell Labs, a world-famous research facility, by a brilliant Canadian scientist — Willard S. Boyle (Figure 10.51). Figure 10.52 A charge-coupled device, part of the Keck telescope in Hawaii Boyle earned a PhD in physics from McGill University in 1950. Three years later, he began working at Bell Labs in New Jersey. Bell Labs recruited the best and brightest research scientists from all over the world. Boyle quickly distinguished himself by finding a way to make lasers produce a continuous beam of light instead of operating in bursts, which until then was the only way they worked. In 1969, along with a colleague, George E. Smith, Boyle was given the task of exploring new areas of solid state physics. They invented the CCD, and very quickly the scientific comm<strong>unit</strong>y and electronic companies showed interest. The age of digital image processing was born. Questions 1. Why is the CCD such an important invention? 2. ScienceSource Find out how CCDs are used in the Keck telescope and other optical telescopes.
Page 1 and 2: UNIT D Light travels through colour
Page 3 and 4: Exploring These doctors are examini
Page 5 and 6: 0 Light is part of the electromagne
Page 7 and 8: 10.1 Here is a summary of what you
Page 9 and 10: During Reading Graphics Support Tex
Page 11 and 12: Uses of the Electromagnetic Spectru
Page 13 and 14: light source white light prism scre
Page 15 and 16: Figure 10.19 The subtractive theory
Page 17 and 18: DI Key Activity D4 Quick Lab Seeing
Page 21 and 22: WORDS MATTER “Incandescent” has
Page 23 and 24: During Reading Get the Picture Even
Page 25 and 26: Figure 10.36 Plasma screens use flu
Page 27 and 28: D7 Quick Lab Analyzing Light Source
Page 31 and 32: Figure 10.42 Light rays travel away
Page 33 and 34: Suggested Activities • • D10 Qu
Page 35: D11 Inquiry Activity Shadows and Ra
Page 39 and 40: 10 CHAPTER REVIEW ACHIEVEMENT CHART
Page 41 and 42: 11 Ray diagrams model the behaviour
Page 43 and 44: 11.1 Mirrors Here is a summary of w
Page 45 and 46: During Reading Diagrams Require Spe
Page 47 and 48: Suggested Activity • D16 Problem-
Page 49 and 50: 422 object ray 1 ray 2 image Figure
Page 51 and 52: Practice Problems 1. A microscope p
Page 53 and 54: Figure 11.16 Parallel light rays ap
Page 55 and 56: D13 Quick Lab Plane Mirror Reflecti
Page 57 and 58: DI Key Activity D15 Inquiry Activit
Page 59 and 60: D16 Problem-Solving Activity Laser
Page 63 and 64: Figure 11.30 The spoon appears to b
Page 65 and 66: Practice Problems 1. The speed of l
Page 67 and 68: Figure 11.36 This diamond is colour
Page 69 and 70: Suggested Activity • D19 Inquiry
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Page 73 and 74: D20 Design a Lab Transmitting Light
Page 75 and 76: 11.3 Lenses Here is a summary of wh
Page 77 and 78: WORDS MATTER The word “lens” is
Page 79 and 80: object ray 2 F ray 1 image Figure 1
Page 81 and 82: Suggested Activity • D25 Inquiry
Page 83 and 84: Practice Problems 1. A convex lens
Page 85 and 86: D23 Skill Builder Activity Drawing
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D25 Inquiry Activity Convex Lens Im
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11.3 CHECK and REFLECT Key Concept
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11 CHAPTER REVIEW ACHIEVEMENT CHART
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2 Optical devices help us see farth
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12.1 Here is a summary of what you
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WORDS MATTER “Pupil” is derived
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Suggested Activity • D28 Inquiry
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(a) near-sightedness (b) near-sight
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(a) (b) Figure 12.17 (a) Loss of th
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D28 Inquiry Activity Sheep Eye Diss
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DI Key Activity CASE STUDY D29 STSE
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12.2 Here is a summary of what you
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Figure 12.24 This portable imaging
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Suggested STSE Activity • D34 Dec
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During Writing Evaluating Informati
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WORDS MATTER The word “laser” i
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Figure 12.39 Long rows of solar cel
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D33 STSE Decision-Making Analysis S
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12.2 CHECK and REFLECT Key Concept
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12 CHAPTER REVIEW ACHIEVEMENT CHART
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D UNIT • Electromagnetic spectrum
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D UNIT Task How Much Light Is Too M
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D UNIT Review Key Terms Review 1. C
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D UNIT Review (continued) 35. (a) D
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D UNIT Review (continued) 62. Descr
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