SAT Subject Physics Practice Question 211: Answer and Explanation

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Question: 211

57.

The drawing shows the displacement of a traveling wave at time t = 0. If the wave speed is 0.5 m/sec, and the wavelength is λ m, what is the period of the wave (in seconds)?

A.
B.
C.
D. 2λ
E. 4λ

Correct Answer: D

Explanation:

The period, T, is the reciprocal of the frequency, and the frequency, f, always satisfies the equation λf = v. So, we find that

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