Frequency

Frequency:

Frequency in oscillation is the number of cycles per second, and in wave motion, it is the number of waves that pass through a given point per second. These cycles per second are called Hertz (Hz) in honor of nineteenth-century German physicist Heinrich Rudolf Hertz (1857-1894), who greatly advanced understanding of electromagnetic wave behavior during his short career.

Denotation:

In physics and technology disciplines, such as optics, acoustics, and radio, frequency is generally denoted by a Latin letter f or by a Greek letter ν (nu).

SI Unit:

In SI units, the unit of frequency is hertz (Hz), named after the German physicist Heinrich Hertz. 1 Hz means that a happening repeats one time per second. A previous name for this unit was cycles per second.

A customary unit of measure utilized with rotating mechanical devices is revolutions per minute, abbreviated RPM. 60 RPM equals one hertz.

Formula:

The time span, usually denoted by T, is the extent of time taken by one cycle, and is the reciprocal of the frequency f:

T=1/f

The SI unit for period is the second.