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<blockquote data-quote="Treversal" data-source="post: 180394" data-attributes="member: 11111"><p>WIKI:</p><p><span style="font-size: 22px"><strong>Physical origin [<a href="https://en.wikipedia.org/w/index.php?title=Cherenkov_radiation&action=edit&section=2" target="_blank">edit</a>]</strong></span></p><p><span style="font-size: 18px"><strong>Basics [<a href="https://en.wikipedia.org/w/index.php?title=Cherenkov_radiation&action=edit&section=3" target="_blank">edit</a>]</strong></span></p><p>While <a href="https://en.wikipedia.org/wiki/Classical_electromagnetism" target="_blank">electrodynamics</a> holds that the <a href="https://en.wikipedia.org/wiki/Speed_of_light" target="_blank">speed of light</a> <em>in a <a href="https://en.wikipedia.org/wiki/Vacuum" target="_blank">vacuum</a></em> is a <a href="https://en.wikipedia.org/wiki/Physical_constants" target="_blank">universal constant</a> (<em>c</em>), the speed at which light propagates in a material may be significantly less than <em>c</em>. For example, the speed of the propagation of light in <a href="https://en.wikipedia.org/wiki/Water" target="_blank">water</a> is only 0.75<em>c</em>. <a href="https://en.wikipedia.org/wiki/Matter" target="_blank">Matter</a> can be accelerated beyond this speed (although still to less than <em>c</em>) during nuclear reactions and in <a href="https://en.wikipedia.org/wiki/Particle_accelerator" target="_blank">particle accelerators</a>. Cherenkov radiation results when a charged particle, most commonly an <a href="https://en.wikipedia.org/wiki/Electron" target="_blank">electron</a>, travels through a <a href="https://en.wikipedia.org/wiki/Dielectric" target="_blank">dielectric</a> (electrically polarizable) medium with a speed greater than that at which light propagates in the same medium.</p></blockquote><p></p>
[QUOTE="Treversal, post: 180394, member: 11111"] WIKI: [SIZE=6][B]Physical origin [[URL='https://en.wikipedia.org/w/index.php?title=Cherenkov_radiation&action=edit§ion=2']edit[/URL]][/B][/SIZE] [SIZE=5][B]Basics [[URL='https://en.wikipedia.org/w/index.php?title=Cherenkov_radiation&action=edit§ion=3']edit[/URL]][/B][/SIZE] While [URL='https://en.wikipedia.org/wiki/Classical_electromagnetism']electrodynamics[/URL] holds that the [URL='https://en.wikipedia.org/wiki/Speed_of_light']speed of light[/URL] [I]in a [URL='https://en.wikipedia.org/wiki/Vacuum']vacuum[/URL][/I] is a [URL='https://en.wikipedia.org/wiki/Physical_constants']universal constant[/URL] ([I]c[/I]), the speed at which light propagates in a material may be significantly less than [I]c[/I]. For example, the speed of the propagation of light in [URL='https://en.wikipedia.org/wiki/Water']water[/URL] is only 0.75[I]c[/I]. [URL='https://en.wikipedia.org/wiki/Matter']Matter[/URL] can be accelerated beyond this speed (although still to less than [I]c[/I]) during nuclear reactions and in [URL='https://en.wikipedia.org/wiki/Particle_accelerator']particle accelerators[/URL]. Cherenkov radiation results when a charged particle, most commonly an [URL='https://en.wikipedia.org/wiki/Electron']electron[/URL], travels through a [URL='https://en.wikipedia.org/wiki/Dielectric']dielectric[/URL] (electrically polarizable) medium with a speed greater than that at which light propagates in the same medium. [/QUOTE]
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