With what speed the wave propagates, if the wavelength is 2 m, and the period of oscillation is 0.2 s.

Given:

L = 2 meters – the length of a certain wave;

T = 0.2 seconds – the oscillation period of this wave.

It is required to determine u (meter per second) – the speed of wave propagation.

Let’s find the frequency of the wave oscillations:

v = 1 / T = 1 / 0.2 = 5 Hertz.

Then, to determine the speed of the wave, you need to use the following formula:

u = L * v = 2 * 5 = 10 meters per second.

Answer: the wave propagation speed is 10 meters per second.