Calculate the frequency of a wave whose time period is \[0.02\,s\].

Hint: to solve this question we have to know about frequency. We know that, the number of waves that pass a fixed point in unit time; additionally, the quantity of cycles or vibrations gone through during one unit of time by a body in intermittent movement.

Complete step by step answer:
A body in intermittent movement is said to have gone through one cycle or one vibration in the wake of going through a progression of occasions or positions and getting back to its unique state. We also know that, a consistently propelling aggravation where the parts go through a shift in course, for example, an advancing unsettling influence on the outside of a fluid. Variety in the transmission of electromagnetic energy, particularly the occasional coarse adjustment of a perusing on an observing gadget.

We know that frequency refers to how regularly something occurs; though Period alludes to the time it takes for something to occur. Recurrence implies how frequently an occasional occasion occurs in a second. A period is a period between any 2 occasions. When in doubt, the period ought to be the proportional of the recurrence, subsequently the condition:
$\text{Period} = \dfrac{{1}}{\text{Frequency}}$
\[\therefore \text{Frequency}=\dfrac{1}{{0.02}} = 50\,Hz\]

Note: We can say, at the point when a wave is available in a medium (that is, when there is an unsettling influence traveling through a medium), the individual particles of the medium are just briefly dislodged from their rest position. There is consistently a power following up on the particles that reestablishes them to their unique position.