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What is the formula for wavelength and frequency?

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Divide the energy by Planck's constant, 6.626 x 10-34, to get the frequency of the wave. Divide the speed of light, ~300,000,000 m/s, by the frequency to get wavelength.Feb 9, 2021');})();(function(){window.jsl.dh('_zmCQYLmmBsjn-wSzypmIDQ50','
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For sound waves in air, the speed of sound is 343 m/s. The wavelength of a tuning fork (440 Hz) is thus equal to approximately 0.78 m. In SI units, the unit of frequency is the hertz (Hz). 1 Hz means that an event repeats once every second.

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