COS has two channels, the Near Ultraviolet ( NUV ) covering 170 320 nm.
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Some authors Spectroscopic investigations are limited to the visible-near ultraviolet region where exciplex lasers operate.
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:Melanin absorbs strongly in the near ultraviolet, and not much at all in the infrared.
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It relies on inelastic scattering, or Raman scattering, of monochromatic light, usually from a laser in the near ultraviolet range.
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With a mirror, Hubble's four main instruments observe in the near ultraviolet, determining the rate of expansion of the universe.
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The SBUV / 2 measures solar irradiance and Earth radiance ( backscattered solar energy ) in the near ultraviolet spectrum ( 160 to 400 nm ).
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I don't know whether the channels should be all in the visible light range, or also in the near infrared or near ultraviolet.
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Still, much of the reported research and applications, utilizing the photoacoustic effect, is concerned with the near ultraviolet / visible and infrared spectral regions.
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"' Xenon monochloride "'( XeCl ) is an excimer which is used in excimer lasers emitting near ultraviolet light at 308 nm.
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For this reason, the near infrared region of the spectrum is commonly incorporated as part of the " optical " spectrum, along with the near ultraviolet.