X-ray
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An X-ray is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays. Roughly, X-rays have a wavelength ranging from
Natural color X-ray photogram of a wine scene. Note the edges of hollow cylinders as compared to the solid candle.
Example of a Crookes tube, a type of discharge tube that emitted X-rays
Wilhelm Röntgen
Hand mit Ringen (Hand with Rings): print of Wilhelm Röntgen's first "medical" X-ray, of his wife's hand, taken on 22 December 1895, and presented to Ludwig Zehnder of the Physik Institut, University of Freiburg, on January 1, 1896
Ultraviolet
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Ultraviolet radiation is electromagnetic radiation of wavelengths of 100–400 nanometers, shorter than that of visible light, but longer than X-rays. Wavelengths between 10 and 100 nanometers are calle
X-ray
…An X-ray is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays. Roughly, X-rays have a wavelength ranging from 10 nanometers to 10 picometers, corresponding to frequencies…
Portable ultraviolet lamp (UVA and UVC)
UV radiation is also produced by electric arcs. Arc welders must wear eye protection and cover their skin to prevent photokeratitis and serious sunburn.
Commercial germicidal lamp in butcher shop
A 380 nanometer UV LED makes some common household items fluoresce.