SAT Subject Physics Practice Question 558: Answer and Explanation

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Question: 558

14. Which wave characteristic describes the number of wave crests passing a given point per unit time?

A. Frequency
B. Amplitude
C. Wavelength
D. Velocity
E. Period

Correct Answer: A


The correct answer is (A). The definition of the frequency of a wave system is the number of waves per unit time, which is the same as saying the number of crests that pass a given point over a given time.

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