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An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (30×1015 Hz to 30×1018 Hz) and energies in the range 124 eV to 124 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. In many languages, X-radiation is referred to as Röntgen radiation, after the German scientist Wilhelm Conrad Röntgen, who discovered it on November 8, 1895. He named it X-radiation to signify an unknown type of radiation. Spellings of X-ray(s) in English include the variants x-ray(s), xray(s), and X ray(s). = Pre-Röntgen observations and research =Before their discovery in 1895, X-rays were just a type of unidentified radiation emanating from experimental discharge tubes. They were noticed by scientists investigating cathode rays produced by such tubes, which are energetic electron beams that were first observed in 1869. Many of the early Crookes tubes (invented around 1875) undoubtedly radiated X-rays, because early researchers noticed effects that were attributable to them, as detailed below. Crookes tubes created free electrons by ionization of the residual air in the tube by a high DC voltage of anywhere between a few kilovolts and 100 kV. This voltage accelerated the electrons coming from the cathode to a high enough velocity that they created X-rays when they struck the anode or the glass wall of the tube. The earliest experimenter thought to have (unknowingly) produced X-rays was actuary William Morgan. In 1785 he presented a paper to the Royal Society of London describing the effects of passing electrical currents through a partially evacuated glass tube, producing a glow created by X-rays.

This GIF Bitmap Image X Ray Free Download GIF HD is a part of X-Rays Category in Medical Folder. X Ray Free Download GIF HD has a Resolution of 98x100 Pixels. X Ray Free Download GIF HD is of .gif (Graphics Interchange Format) Format. It's Size is 2.7KB. This GIF has been Downloaded 68 times till now. X Ray Free Download GIF HD was Added on 05-07-2021. Download X Ray Free Download GIF HD by clicking the button below:

Image Name: X Ray Free Download GIF HD
Image Category: Medical / X-Rays
Date Added: 05-07-2021
Resolution: 98x100

Format: GIF
Downloads: 68
Views: 81
Size: 2.7KB

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