Total Internal Reflection
Q. Which of the following phenomena is NOT a result of total internal reflection?
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A.
Mirage
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B.
Fiber optics
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C.
Rainbows
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D.
Prism dispersion
Solution
Prism dispersion involves refraction and not total internal reflection. The other options are phenomena that utilize total internal reflection.
Correct Answer: D — Prism dispersion
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Q. Which of the following statements about total internal reflection is true?
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A.
It can occur at any angle of incidence
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B.
It requires a denser medium to be on the incident side
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C.
It can occur when light travels from air to water
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D.
It is a phenomenon exclusive to optical fibers
Solution
Total internal reflection requires that the light travels from a denser medium to a rarer medium, making the second statement true.
Correct Answer: B — It requires a denser medium to be on the incident side
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Q. Which of the following statements is true regarding total internal reflection?
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A.
It occurs when light travels from a denser to a rarer medium.
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B.
It occurs when light travels from a rarer to a denser medium.
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C.
It can occur at any angle.
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D.
It requires a prism.
Solution
Total internal reflection occurs when light travels from a denser medium to a rarer medium.
Correct Answer: A — It occurs when light travels from a denser to a rarer medium.
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