Question

40 waves passing through the point on the surface of a pond in 2 sec. Find its frequency

Answer 1

The answer to your question could be:-

Frequency is the number of vibrations a body undergoes under a certain amount of time.

The frequency at which vibrations are passing through a body is calculated by using this equation:

                                               f = 1/T

{"f" represents frequency whereas "T" represents the time taken for the all the vibration to reach the body.}

Therefore the frequency of the waves that pass through the point on the surface of the water =

                                               f = 40/2 = 20

{Notice how "1" has been replaced by the number of vibrations and "T" has been replaced for all those 40 vibrations to pass through the point on the surface of the water.}

Therefore the frequency of the waves is = 20 Hz (or hertz).