The frequency is a
measurement of repeated occurances of an
event. In
statistics, the frequency can be the count of events during an entire experiment. The unit for frequency is
Hertz (named after German physicist [Heinrich Rudulf Hertz]
?), and is the inverse of
seconds, the unit for
time. This requires that the count of occurances is divided by the time duration of the experiment or measurement. In measuring the frequency of
sound, [electromagnetic waves]
? (such as
radio or
light) or electrical signals, the frequency in Hertz is the number of full cycles (of a sine wave) per second. Some (old) radio receivers had the dial measured in megacycles per second (Mc/s) rather than megahertz.
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