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Introduction by NASA to ultraviolet - or UV - light and its uses.
The region just below the visible in wavelength is called the near ultraviolet. It is absorbed very strongly by most solid substances, and even absorbed appreciably by air.
The story of the blackbody radiation and the ultraviolet catastrophe which eventually led to quantum mechanics.
Taking the electron transitions associated with visible and ultraviolet interactions with matter as an example, absorption of a photon will occur only when the quantum energy of the photon precisely ...
The site explains the basic of the electromagnetic spectrum and the various wavelengths of which it is composed (Radio Waves, Microwaves , Infrared, the Visible Spectrum, Ultraviolet, Gamma Rays, ...
NASA page about electromagnetic waves with descriptions of such waves and their uses.Covers radio waves, microwaves, infrared, visible light, ultraviolet (UV), x-rays and gamma rays.
A Marvin and Milo activity about ultraviolet. All you need is a two clear glasses, tap water, tonic water and dark paper.