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Ultra violet

UV is a form of radiation generated by atomic transitions in chemical reactions such as those present in the Sun and in man-made equipment s...

Wednesday, July 22, 2009

Spectrum of a helium neon laser


Spectrum of a helium neon laser showing the very high spectral purity intrinsic to nearly all lasers. Compare with the relatively broad spectral emittance of a light emitting diode.

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