Frequency Definition

In physics, frequency is described as the number of waves that pass from a point in a single second. It measures how many times a particular wave passes through in one second. Or in mathematical form, frequency is defined as the reciprocal of time. The SI unit is used to measure frequency in Hz (Hertz). For instance, if you have 100 waves per second coming at an observer, their frequency would equal 10Hz since each cycle repeats itself ten times within one second. The values of frequency can range from about 0Hz (no periodic behavior) up to infinity. To determine the frequency or a wave period, you can use the formula listed below. Moreover, you can use our frequency calculator for instant solutions.


Table of Contents

Formula of Frequency

To determine centripetal acceleration, you can use the formula listed below, or you can find your solutions instantly by using our free online centripetal calculator.

f = 1 / T


f = Frequency of a wave

T = Time taken by a wave to complete its cycle


To calculate the frequency, you can use our Frequency Calculator.


For a more precise understanding of a concept, let's solve an example below:

Suppose if a wave moves in an ideal situation and 0.45s it completes each cycle, then find out the frequency accomplished by a wave.

Given data

T = time = 2s

To Find

Frequency of a wave = ?


To find out the frequency of a wave, we will use the formula listed below:

f = 1 / T

Putting values in the formula:

f = 1 / 0.45 s = 2.22 Hz