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The range of wavelengths of frequencies over which electromagnetic radiation extends

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A wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.

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Related to wavelength, frequency and period by the equation wave speed = frequency x wavelength.
The most commonly used wave speed is the speed of visible light, an electromagnetic wave.

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The rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second.

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The maximum extent of a vibration or oscillation, measured from the position of equilibrium.

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The spatial period of the wave - the distance over which the wave's shape repeats, and thus the inverse of the spatial frequency

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A periodic disturbance of the particles of a substance that may be propagated without net movement of the particles, such as in the passage of undulating motion, heat, or sound.