is10_sb_unit_d

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D3 Quick Lab Component Colours of Light Purpose To experiment with the component colours of light using subtractive colour theory Materials & Equipment • red, green, blue colour filters • computer screen or LCD projector Procedure 1. Make an observation table like the following for recording your observations. Give your table a title. Colour of Circle on Screen Filter Colour Red Green Blue Yellow Circle Appears Cyan Circle Appears 2. Your teacher will display three coloured circles on the computer screen of the primary subtractive colours of yellow, cyan, and magenta. 3. Hold up the red filter in front of your eyes as you look at the three circles on the screen. Record the colour that each circle appears to be. Be as accurate with your description of the colour as possible. Fill in the row for the red filter in your observation table. 4. Repeat step 3 with the green filter. 5. Repeat step 3 with the blue filter. Magenta Circle Appears 6. Optional: At a computer terminal, launch the picture editing application indicated to you by your teacher. On a new document, create a circle and fill it with any colour, then open the colour editing dialogue box and adjust the settings to the values indicated in Table 10.2. Record the colour you see. Table 10.2 Picture Editing Colour Levels Questions Colour Level Red Green Blue Colour Produced 255 0 0 0 255 0 0 0 255 0 255 255 255 0 255 255 255 0 7. The transparent colour filters act like pigments to block certain colours and allow only one colour to reach your eyes. State what colours are blocked by the: (a) red filter (b) green filter (c) blue filter 8. If a colour becomes black while viewing it through a coloured filter, what does that tell you about the colour(s) of light reaching your eyes? 9. If a colour appears washed out while viewing it through a coloured filter, what does that tell you about the colour(s) of light reaching your eyes? 10. Explain your observations for step 3. 11. Explain your observations for step 4. 12. Explain your observations for step 5. 13. Optional: Compare the colours created in step 6 to Figure 10.19 on the previous page. Were the colours you created on the monitor the same as the colours shown in the illustration? Explain. Light is part of the electromagnetic spectrum and travels in waves. 389
DI Key Activity D4 Quick Lab Seeing the Invisible (Teacher Demonstration) Purpose To observe evidence of ultraviolet and infrared radiation and to examine protection from ultraviolet radiation Materials & Equipment • infrared-based remote controller • digital camera • black light • Canadian currency note • yellow felt pen Procedure Part 1 — Infrared Controller 1. Locate the part of the infrared remote controller that produces the infrared signal. Verify that the signal it transmits is invisible to the unaided eye. 2. Point the controller at a digital camera and view the controller in operation through the camera display. What do you see? Record your observations in your notebook. Part 2 — Black Lights 3. Black lights release as much radiation as a regular light, but most of the radiation is in the form of ultraviolet radiation, which is invisible to humans. Hold a Canadian currency note up to the black light. What do you see? Record your observations in your notebook. 390 UNIT D Light and Geometric Optics • paper • yellow highlighter • SPF 25 or greater sunblock • vegetable oil CAUTION: Do not look at the black light for long periods of time. Part 3 — Sunblock 4. Using the yellow felt pen, draw three circles about 3 cm in diameter on a sheet of paper and colour them in. Label the series of circles “felt pen.” 5. Using a yellow highlighter, make three more circles the same size and colour them in. Label them “highlighter.” 6. Cover one “highlighter” and one “felt pen” circle with SPF 25 or greater sunblock. 7. Cover another “highlighter” and “felt pen” circle with vegetable oil. 8. Leave the remaining two circles untreated. 9. Use the black light to shine radiation on all of the yellow circles. Record your observations in your notebook. Questions 10. In Part 1, the digital camera detected radiation in the infrared region of the spectrum and then displayed it in the visible spectrum. Did the visible radiation have a longer or a shorter wavelength than the radiation that was produced by the controller? Explain. 11. (a) Explain how the markings on the currency note that were invisible in ordinary light became visible under a black light in Part 2. (b) How might a black light be used to determine whether a currency note is a forgery? 12. (a) Briefly describe each of the circles in Part 3 as they appeared under black light. (b) What was the reason for leaving two circles untreated? (c) What was the reason for covering two circles with oil? (d) Explain why both a felt pen and a highlighter pen were used in this activity. 13. You may have observed that the camera and the remote control allowed you to “see” ultraviolet and infrared rays, light that is usually invisible to the human eye. How was this possible?
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: Figure 10.19 The subtractive theory
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 and 36: D11 Inquiry Activity Shadows and Ra
Page 37 and 38: Investigating 410 UNIT D Light and
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
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Figure 11.36 This diamond is colour
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Suggested Activity • D19 Inquiry
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D18 Inquiry Activity Refraction Mea
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D20 Design a Lab Transmitting Light
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11.3 Lenses Here is a summary of wh
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WORDS MATTER The word “lens” is
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object ray 2 F ray 1 image Figure 1
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Practice Problems 1. A convex lens
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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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(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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