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# How is frequency measured?

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Frequency is measured using a unit called the hertz to denote the number of cycles a wave produces in a second. The number of hertz is calculated by dividing the number of repeat cycles by the length of time in seconds.

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Frequency of a sound wave can also be measured by dividing the speed of sound by the wavelength, represented by the Greek letter lambda. Physicists use different methods to calculate the frequency, including a simple counter, a stroboscope, a frequency counter and heterodyne methods. A frequency counter is used to measure electrical waves, while a stroboscope measures the frequency of light waves.

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## Related Questions

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The term "hertz," in physics, defines a standard unit of frequency measurement and is equal to one cycle per second; it is abbreviated as "Hz." It was named after Heinrich Hertz (1857-1894), a German physicist who was the first person to prove the existence of electromagnetic waves.

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To convert hertz to joules, simply multiply the number in hertz with the value of the conversion factor "x." The conversion factor value is 6.62606957(29) x 10^-34.

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The unit for frequency in the International System of Units is hertz, which is abbreviated as Hz. One hertz is defined as a frequency of one cycle per second.