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Gamma rays are the shortest waves in the spectrum and, as a result, have the most energy.

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X-rays have even shorter wavelengths than ultraviolet rays.

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Ultraviolet waves have the next shortest wavelength after visible light.

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The visible light spectrum covers the wavelengths that can be seen by the human eye.

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Infrared waves are sometimes classified as "near" infrared and "far" infrared.

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Microwaves are shorter than radio waves with wavelengths measured in centimeters.

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Radio waves have the longest wavelengths of all the electromagnetic waves.

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The frequency of a wave can be calculated by dividing the speed of the wave by the wavelength.

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The distance between one peak or crest of a wave and the next peak or crest.

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Sound waves

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Water waves

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Do not require a medium

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A waves that requires a medium

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Move one's hand to and fro in greeting or as a signal.