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GAMMA RAYS penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.

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GAMMA RAYS penetrating electromagnetic radiation of a kind arising from the radioactive decay of atomic nuclei.

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an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light

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ULTRAVIOLET having a wavelength shorter than that of the violet end of the visible spectrum but longer than that of X-rays.

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ULTRAVIOLET having a wavelength shorter than that of the violet end of the visible spectrum but longer than that of X-rays.

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VISIBLE LIGHT Visible light is a form of electromagnetic (EM) radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths that are visible to most human eyes. ... This broad range of wavelengths is known as the electromagnetic spectrum.

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VISIBLE LIGHT Visible light is a form of electromagnetic (EM) radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths that are visible to most human eyes. ... This broad range of wavelengths is known as the electromagnetic spectrum.

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INFRARED having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects.

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INFRARED having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves. Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects.

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

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

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

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LONGITUDINAL WAVES a wave vibrating in the direction of propagation.

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LONGITUDINAL WAVES a wave vibrating in the direction of propagation.

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

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

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one of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity

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 MECHANICAL WAVES: a wave require a medium 

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 MECHANICAL WAVES: a wave require a medium 