Chapter 27

1. Chapter 27 Color

2. Color depends mostly on light’s • frequency. • speed. • transmission. • amplitude.

3. Color depends mostly on light’s • frequency. • speed. • transmission. • amplitude.

4. To say that rose petals are red is to say that they • absorb red. • reflect red. • emit red. • transmit red.

5. To say that rose petals are red is to say that they • absorb red. • reflect red. • emit red. • transmit red.

6. The colored light that passes through a piece of transparent blue glass is • blue. • yellow, the opposite color of blue. • actually green. • red minus magenta.

7. The colored light that passes through a piece of transparent blue glass is • blue. • yellow, the opposite color of blue. • actually green. • red minus magenta. Comment: Why do children correctly answer this while some overly cautious adults don’t?

8. The solar radiation curve is • the path the Sun takes at nighttime. • the path the Sun takes at all times of day. • a plot of brightness versus frequency of sunlight. • a plot of wavelength versus frequency of sunlight.

9. The solar radiation curve is • the path the Sun takes at nighttime. • the path the Sun takes at all times of day. • a plot of brightness versus frequency of sunlight. • a plot of wavelength versus frequency of sunlight. Comment: Such a curve is shown in Figure 27.7.

10. The color of newer fire engines and tennis balls • is consistent with the solar radiation curve. • is not consistent with the solar radiation curve. • has nothing to do with the solar radiation curve. • led to the formulation of the solar radiation curve.

11. The color of newer fire engines and tennis balls • is consistent with the solar radiation curve. • is not consistent with the solar radiation curve. • has nothing to do with the solar radiation curve. • led to the formulation of the solar radiation curve.

12. The color to which our eyes are most sensitive is • red. • yellow. • yellowish green. • blue.

13. The color to which our eyes are most sensitive is • red. • yellow. • yellowish green. • blue.

14. When red and blue light are overlapped, the color produced is • magenta. • yellow. • cyan. • white.

15. When red and blue light are overlapped, the color produced is • magenta. • yellow. • cyan. • white.

16. A mixture of tiny magenta and yellow dots on a printed page appears • red. • yellow. • blue. • green.

17. A mixture of tiny magenta and yellow dots on a printed page appears • red. • yellow. • blue. • green.

18. The colors on the cover of your physics book are due to • color addition. • color subtraction. • color interference. • scattering.

19. The colors on the cover of your physics book are due to • color addition. • color subtraction. • color interference. • scattering.

20. When transparent yellow, magenta, and cyan filters are overlapped, the result is • white. • red. • infrared. • black.

21. When transparent yellow, magenta, and cyan filters are overlapped, the result is • white. • red. • infrared. • black. Comment: See Figure 27.12.

22. The complementary color of blue is • magenta. • yellow. • cyan. • white.

23. The complementary color of blue is • magenta. • yellow. • cyan. • white.

24. How many colors of ink were used to print the colored photos in your textbook? • One plus black • Two plus black • Three plus black • Four plus black

25. How many colors of ink were used to print the colored photos in your textbook? • One plus black • Two plus black • Three plus black • Four plus black

26. For mixing pigments or dyes, the primary colors are magenta, cyan, and • red. • green. • yellow. • blue.

27. For mixing pigments or dyes, the primary colors are magenta, cyan, and • red. • green. • yellow. • blue.

28. The redness of a sunup or sunset is due mostly to light that hasn’t been • absorbed. • transmitted. • scattered. • polarized.

29. The redness of a sunup or sunset is due mostly to light that hasn’t been • absorbed. • transmitted. • scattered. • polarized.

30. The blueness of the daytime sky is due mostly to light • scattering. • absorption. • transmission. • reflection.

31. The blueness of the daytime sky is due mostly to light • scattering. • absorption. • transmission. • reflection.

32. The color of light that passes most readily through a thick atmosphere is • red. • white. • blue. • violet.

33. The color of light that passes most readily through a thick atmosphere is • red. • white. • blue. • violet.

34. When relatively large particles contribute to the mix of particles in the atmosphere, the sky is • bluish. • reddish. • whitish. • greenish.

35. When relatively large particles contribute to the mix of particles in the atmosphere, the sky is • bluish. • reddish. • whitish. • greenish.

36. If molecules in the sky scattered low-frequency light more than high-frequency light, the color of the sky at noon would be • red. • green. • blue. • white.

37. If molecules in the sky scattered low-frequency light more than high-frequency light, the color of the sky at noon would be • red. • green. • blue. • white.

38. The greenish blue of ocean water is due mostly to the absorption of • scattered light. • infrared light. • ultraviolet light. • reflected light.

39. The greenish blue of ocean water is due mostly to the absorption of • scattered light. • infrared light. • ultraviolet light. • reflected light.

40. Clouds are white because of scattering from • a large variety of particle sizes. • tiny particles. • medium-size particles • large particles.

41. Clouds are white because of scattering from • a large variety of particle sizes. • tiny particles. • medium-size particles • large particles.