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Ultraviolet

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The Sun in ultraviolet

Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range 10 nm to 400 nm.

Fluorescence

A set of mineral samples brilliantly fluorescing at various wavelengths as seen while being irradiated by UV light.

Many substances absorb visible and ultraviolet radiations an they have visible and ultraviolet spectra.[1] Many minerals and gems fluoresce to various degree under ultraviolet light, or may fluoresce differently under short wave ultraviolet versus long wave ultraviolet.

The spectrum of a uniform light source rendered into the sRGB color space. The ultraviolet is, in the range 10nm to 400nm (not visible to human eyes)

References

  1. Brady, James E.; Holum, John R (1996). Chemistry: The Study of Matter and its Changes (2nd ed.). New York: John Wiley & Sons. p. 224. ISBN 0-471-10042-0.