SAT Subject Physics Practice Question 165: Answer and Explanation

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Question: 165

11. Which is due to the change in wave speed when a wave strikes the boundary to another medium?

A. Reflection
B. Refraction
C. Polarization
D. Diffraction
E. Interference

Correct Answer: B


Refraction, the change in the direction of a wave when it enters a new medium, is caused by the change in the speed of the wave as it travels within the new medium.

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