SAT Subject Physics Practice Question 211: Answer and Explanation
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)?
Correct Answer: D
The period, T, is the reciprocal of the frequency, and the frequency, f, always satisfies the equation λf = v. So, we find that