SAT Subject Physics Practice Question 210: Answer and Explanation

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Question: 210


What is the wavelength of the wave?

A. 0.08 m
B. 0.16 m
C. 0.20 m
D. 0.40 m
E. 0.60 m

Correct Answer: D


Each “hump” along the wave represents half a cycle, or half a wavelength. The drawing given with the question shows three such consecutive humps having a total length of 0.6 m, so each one has a length of 0.2 m. Since this is half a wavelength, the full wavelength must be 0.4 m.

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