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A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium.

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A wave vibrating in the direction of propagation.

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A wave in which the direction of displacement is perpendicular to the direction of propagation, as a surface wave of water.

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The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium.

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The distance light can travel in a unit of time through a given substance.

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One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity and that include radio waves, infrared, visible light, ultraviolet, X-rays, and gamma rays.

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One of the characteristics of light is that it behaves like a wave. As a result, light can be defined by its wavelength and frequency.

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The number of cycles or completed alternations per unit time of a wave or oscillation.

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The absolute value of the maximum displacement from a zero value during one period of oscillation.

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the distance, measured in the direction of propagation of a wave, between two successive points in the wave that are characterized by the same phase of oscillation.