This is known as phosphorescence. Phosphorescent resources may also be fired up by bombarding them with subatomic particles. Cathodoluminescence is one particular instance. This system is Employed in cathode-ray tube television sets and Personal computer displays.
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[eighteen] Even so, the favored description of light remaining "stopped" in these experiments refers only to light getting stored within the energized states of atoms, then re-emitted at an arbitrary later on time, as stimulated by a second laser pulse. In the course of the time it experienced "stopped", it experienced ceased for being light. Optics
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In 1678, Christiaan Huygens (1629–1695) revealed Traité de la Lumiere, ثريات where he argued in favor of the wave nature of light. Huygens stated that an expanding sphere of light behaves like each issue within the wave entrance were being a different supply of radiation of a similar frequency and period.
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Noting discrepancies during the obvious period of Io's orbit, he calculated that light can take about 22 minutes to traverse the diameter of Earth's orbit.[fifteen] Nonetheless, its size wasn't recognised at that time. If Rømer had recognized the diameter from the Earth's orbit, he might have calculated a velocity of 227000000 m/s.
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