Review Questions: Modern Physics
Answers
A.Its frequency
B. Its wavelength
C. both of these
D. neither of these
2. When the frequency of light matches the natural frequency of molecules in a material, light is
A. absorbed.
B. transmitted.
C. reflected.
D. none of these.
Reasoning: See page 500 of your textbook.
3. The color of an opaque object is the same as the light that is
A. transmitted.
B. absorbed.
C. reflected.
D. all of these.
E. none of these.
4. What color light is transmitted by a piece of blue glass?
A. red
B. white
C. blue
D. yellow
E. orange
Reasoning: See page 517 of your text.
5. The brightest color emitted by the sun is
A. red.
B. orange.
C. yellow-green.
D. green-blue.
E. violet.
Reasoning: See page of your text.
6. Which will warm up quicker in sunlight?
A. a piece of colored glass
B. a piece of clear glass
C. both the same
7. Light shines on a pane of green glass and a pane of clear glass. The temperature will be higher in the
A. clear glass.
B. green glass.
C. ...neither, it will be the same in each.
8. The colored dots that make up the color on a TV screen are
A. red, blue, yellow.
B. red, blue, green.
C. yellow, blue, green.
D. magenta, cyan, yellow.
E. red, green, yellow.
9. Complementary colors are two colors that
A. look good together.
B. are additive primary colors.
C. are subtractive primary colors.
D. produce white light when added together.
E. are right for each other.
10. The complementary color of blue is
A. red.
B. green.
C. yellow.
D. cyan.
E. magenta.
11. Magenta light is really a mixture of
A. red and blue light.
B. red and cyan light.
C. red and yellow light.
D. yellow and green light.
E. none of these.
12. Colors seen on TV result from color
A. addition.
B. subtraction.
C. either of these.
D. neither of these.
13. Colors seen on the cover of our physics book result from color
A. addition.
B. subtraction.
C. either of these.
D. neither of these.
14. A mixture of red and green pigments appears
A. orange.
B. yellow.
C. magenta.
D. blue.
E. blackish brown.
15. A mixture of cyan and yellow pigments appears
A. orange.
B. green.
C. magenta.
D. blue.
E. blackish brown.
Reasoning: This is subtractive mixing.See
page 523, figure 27.12.
16. Look at a full-color picture in a magazine with a magnifying glass and you'll see that the inks used are
A. red, green, and blue.
B. red, green, blue, and black.
C. magenta, cyan, and yellow.
D. magenta, cyan, yellow, and black.
E. none of these.
17. Which interacts more with light of relatively high frequencies?
A. large particles
B. small particles
C. both the same
18. The sky is blue because air molecules in the sky act as tiny
A. mirrors which reflect only blue light.
B. resonators which scatter blue light.
C. sources of white light.
D. prisms.
E. none of these.
19. A whitish sky is evidence that the atmosphere contains
A. predominantly small particles.
B. predominantly large particles.
C. a mixture of particle sizes.
D. water vapor.
E. pollutants.
20. The sky is the deepest blue
A. just before a rainstorm.
B. during a rainstorm.
C. just after a rainstorm.
D. when the air is humid.
E. just before sunset.
Reasoning: See page 525 of your text.
21. Red sunsets are due to lower frequencies of light that
A. are scattered from larger particles in the air.
B. are refracted from larger particles in the air.
C. are reflected by clouds and relatively large particles in the air.
D. survive being scattered in the air.
E. appear reddish orange to the eye.
22. The sun is more likely to appear red at sunset than in the middle of the day as a result of the
A. scattering of lower frequencies by larger particles in the air.
B. longer path of air through which sunlight travels.
C. lower frequencies of light emitted late in the day by the sun.
D. pollutants emitted by humans in daylight hours.
E. absorption effects of the smaller particles in the air.
23. A variety of sunset colors is evidence for a variety of
A. elements in the sun.
B. apparent atmospheric thicknesses.
C. atmospheric particles.
D. atmospheric temperatures.
E. primary colors.
24. The whiteness of clouds is evidence in the clouds for a variety of
A. particle sizes.
B. molecules.
C. "seeds" upon which condensation of cloud material forms.
D. light intensities.
E. water prisms.
25. The greenish blue of water is evidence for the
A. reflection of greenish-blue light.
B. reflection of red light.
C. absorption of greenish-blue light.
D. absorption of red light.
E. interaction between green and blue frequencies of light.
Reasoning: See page 528 of your text.