How is the frequency calculated?

The period is 1 ms and the frequency is 1000 Hz. Frequency (English: frequency) refers to the number of times an event occurs repeatedly in a unit time, which is usually represented by the symbol F in physics. The international system of units is adopted, and the unit is Hertz (in English, abbreviated as Hz). Let an event be repeated n times in t time, then the frequency of this event is f=n/t Hz. Because the period is defined as the minimum time interval between repeated events, the frequency can also be expressed as the reciprocal of the period.

For convenience, long and slow waves (such as surface waves on the ocean surface) usually describe their fluctuation characteristics in terms of periods. Shorter and faster waves, such as sound waves and radio waves, usually use frequency to describe their wave properties.

In the international system of units, the unit of frequency-Hertz (English: hertz, abbreviated as Hz) is based on the German physicist heinrich hertz (English:? Heinrich rudolf hertz? , 65438+February 22nd 0857-1 894 65438+1October1). 1 Hz means that the event occurs once every second.

Other units used to express frequency are: the traditional unit of measurement used in the field of rotating machinery and equipment is speed per minute (rpm). In medicine, heart rate is measured by beats per minute (bpm).