Question

What does $80$ Hz mean?

Answer 1

Frequency is the number of crests of a wave that travel through a given point in a provided unit time. The most general unit of frequency is the hertz (Hz), corresponding to one crest per second. The frequency of a wave can be measured by taking the ratio of the speed of the wave and the wavelength.

Complete step-by-step answer:
Frequency is the number of results of a recurrent event per unit time. It is referred to as transient frequency, which highlights the diversity of spatial repetition and angular frequency. Frequency is estimated in hertz (Hz), which is equivalent to one result per second. The time is the duration of the event of one cycle in a recurrent event, so the time period is the reciprocal of the frequency.
Frequency is the number of vibrations experienced during one unit time by an object in cyclic motion; the number of waves that move a fixed location in unit time. A body in periodical motion has experienced one cycle after passing through a sequence of events or positions and reverting to its primary state.
The hertz is the derived factor of frequency in the International System of Units and is one cycle per second. So, $80$ Hz is $80$ cycles per second.

Additional Information: Frequency is essential in wireless or broadcast communications, where the frequency is mathematically linked to the wavelength. If f denotes the frequency of an electromagnetic domain in free space as estimated in megahertz, and $\lambda$ is the wavelength as estimated in meters, then
$\lambda = \dfrac{300}{f}$

Note: In general, frequency is the reciprocal of the time period. For the varying current, frequency is the number of total cycles per second in the AC direction. The conventional unit of frequency is the hertz, Hz. If a current finishes one cycle per second, then the rate is $1$ Hz; $60$ rounds per second equals $60$ Hz (the standard AC utility frequency in some countries).