If we consider a particular event then a number of time the particular event repeats itself in a specified unit of time is called the frequency. We also say the frequency is the inverse of period, here period is that time taken by one complete cycle of work.

## frequency converter

In order to understand frequency, let’s take an example, we consider the paddling of bicycle, here person A paddles the bicycle in order to reach one place, now in order to reach to a particular place let the number of paddling or rotation he does is n, now if we take some unit time, suppose one minute, the number of paddling done in one minute can be considered the frequency of the paddling.

Now time taken for one paddling can be considered as the time period of the one paddling. And the reciprocal of this time period is considered as the frequency of the activity.

**Some of the common examples of the frequency**

- A human heart in an average beats for 72 times a minutes.
- The to and fro motion of the pendulum, the frequency can be thought as of the number of time the pendulum oscillates in a particular minute.
- The number of time you blink your eyes in one minute can be considered as the frequency of your blinking eyes.

**Units **

The SI unit of frequency is hertz which is the name of the scientist and is named after German physicist Heinrich Hertz, one hertz is the number of events which repeats itself in one second for example if the frequency of your television is one Htz then we can say that your TV screen changes in every one second for one time.

** How to calculate the frequency **

The main formula to calculate frequency is **a total number of repetition/ total time taken for the repetition,** by doing so you will get the number of revolution in unit time.

**F=1/t**, this formula says that frequency is the reciprocal of a time period, according to this formula, with an increase in frequency time period decrease and with the increase in time period frequency decreases.

You can also use frequency counter in order to count the number of frequency, this is one of the most used devices for the purpose.

**Types of frequency **

- Angular Frequency the Greek letter omega is used to denote this frequency and this is the rate at which angular displacement or we can also consider the rate at which the phase of sinusoidal waveform changes with respect to time.

- Spatial frequency this can be thought somewhat similar to frequency, the only difference between them is the time axis is replaced by one or more spatial displacements axes.

- Frequency is one of the major aspects of defining the characteristics of an electromagnetic wave or any type of wave.

- frequency plays a major role in the alternate current definition and in addition to this frequency is the major aspect in industries