Chapter 18 Practice Problems, Review, and Assessment
Section 1 Refraction of Light: Practice Problems
1. A laser beam in air enters ethanol at an angle of incidence of 37.0°. What is the angle of refraction?
SOLUTION: ANSWER: 26.3
o
2. As light travels from air into water, the angle of refraction is 25.0° to the normal. Find the angle of incidence.
SOLUTION: ANSWER: 34.2o
3. Light in air enters a diamond facet at 45.0°. What is the angle of refraction?
SOLUTION: ANSWER: eSolutions
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17.0
o
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ANSWER: 34.2o18 Practice Problems, Review, and Assessment
Chapter
3. Light in air enters a diamond facet at 45.0°. What is the angle of refraction?
SOLUTION: ANSWER: 17.0
o
Section 1 Refraction of Light: Review
7. Index of Refraction A ray of light in air has an angle of incidence of 30.0° on a block of unknown material and an angle of refraction of 20.0°, as shown in Figure 10. What is the index of refraction of the material?
SOLUTION: ANSWER: 1.46Manual - Powered by Cognero
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ANSWER: o
17.0 18 Practice Problems, Review, and Assessment
Chapter
Section 1 Refraction of Light: Review
7. Index of Refraction A ray of light in air has an angle of incidence of 30.0° on a block of unknown material and an angle of refraction of 20.0°, as shown in Figure 10. What is the index of refraction of the material?
SOLUTION: ANSWER: 1.46
9. Speed of Light What is the speed of light in chloroform (n = 1.51)?
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ANSWER: 1.99×108 m/s
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ANSWER: 1.46
Chapter
18 Practice Problems, Review, and Assessment
9. Speed of Light What is the speed of light in chloroform (n = 1.51)?
SOLUTION: ANSWER: 1.99×108 m/s
Chapter Assessment
Section 1 Refraction of Light: Mastering Concepts
37. How does the angle of incidence compare with the angle of refraction when a light ray passes from air into glass at
a nonzero angle?
SOLUTION: The angle of incidence is larger than the angle of refraction, because air has a smaller index of refraction.
ANSWER: The angle of incidence is larger than the angle of refraction, because air has a smaller index of refraction.
38. How does the angle of incidence compare with the angle of refraction when a light ray leaves glass and enters air at
a nonzero angle?
SOLUTION: The angle of incidence is smaller than the angle of refraction, because glass has a larger index of
refraction.
ANSWER: The angle of incidence is smaller than the angle of refraction, because glass has a larger index of
refraction.
40. Ranking Task Figure 29 depicts a ray of light traveling from air into several mediums. Rank the mediums
according to index of refraction from greatest to least. Specifically indicate any ties.
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ANSWER: The angle of incidence is smaller than the angle of refraction, because glass has a larger index of
refraction.
Chapter
18 Practice Problems, Review, and Assessment
40. Ranking Task Figure 29 depicts a ray of light traveling from air into several mediums. Rank the mediums
according to index of refraction from greatest to least. Specifically indicate any ties.
SOLUTION: C>D>B>A
ANSWER: C>D>B>A
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