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Gamma rays have the smallest wavelengths and the most energy of any wave in the electromagnetic spectrum.

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a photographic or digital image of the internal composition of something, especially a part of the body, produced by X-rays being passed through it and being absorbed to different degrees by different materials.

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the ultraviolet part of the spectrum; ultraviolet radiation.

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

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having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves.

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an electromagnetic wave with a wavelength in the range 0.001–0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation. Microwaves are used in radar, in communications, and for heating in microwave ovens and in various industrial processes.

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an electromagnetic wave of a frequency between about 104 and 1011 or 1012 Hz, as used for long-distance communication.

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the rate at which something occurs or is repeated over a particular period of time or in a given sample.

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the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

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a wave vibrating in the direction of propagation.

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a wave vibrating at right angles to the direction of its propagation.

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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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In physics, a wave is a traveling disturbance that travels through space and matter transferring energy from one place to another. When studying waves it's important to remember that they transfer energy, not matter.

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Electromagnetic waves are waves which can travel through the vacuum of outer space.