Question

Which of the measurements would be the most helpful in determining the wavelength

W

X

Y

Z

Answer 1

So we want to know what do we need to measure to determine the wavelength of the wave on the image. A wavelength is the distance between peaks of the wave. More generally, the distance on which the wave shape repeats. So on the image we need to measure X to determine the wavelength. So the correct answer is X.