Question

How is frequency measured?

Answer 1

Explanation:

1. The length of an entire wave cycle is measured in terms of wavelength. The distance covered by a point on a wave is its velocity. The relationship between wavelength and velocity is typically proportional to any wave. Through the wave velocity formula, it is described.

2. Velocity And Wavelength: The velocity of a wave is equal to the product of its wavelength and frequency. The formula for wave velocity, which is represented as, $V=f\times \lambda$

Where $V=$the velocity of the wave is measured using $m/s$, $f=$the frequency of the wave is measured using $Hz$, and $\lambda =$the wavelength of the wave is measured using $m$.

3. Counting: The number of times a recurring event occurs within a given time period is counted, and the number is then divided by the duration of the time period to determine the frequency of the occurrence.

Example: If $75$ events occur within $16$ seconds the frequency is

$\begin{array}{l}f=\frac{75}{16}\\ f=4.69 \mathrm{Hz}\end{array}$

4. Stroboscope: The object completes one cycle of oscillation and returns to its original location between flashes of light when the frequency of the strobe and the rotating or vibrating object are equal. As a result, when lit by the strobe, the object seems stationary. The calibrated readout on the stroboscope can then be used to determine the frequency.