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Unformatted text preview: Exam Name__Reflection and refraction______________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Dispersion of electromagnetic waves A) results from the fact that waves of different frequencies travel at different speeds in matter. B) accounts for the fact that the sky is blue. C) is the underlying phenomenon utilized in some types of sunglasses. D) refers to the phenomenon wherein a ray changes direction when it passes from one material into another. 2) When light travels from air into water, A) its frequency changes, but its velocity and wavelength do not change. B) its velocity and wavelength change, but its frequency does not change. C) its velocity changes, but its frequency and wavelength do not change. D) its wavelength changes, but its velocity and frequency do not change. 3) A ray in glass is incident onto a water- glass interface, at an angle of incidence equal to half the critical angle for that interface. The indices of refraction for water and the glass are 1.33 and 1.55, respectively. for that interface....
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- Spring '11