Learn about the Ruby Laser in this educational video from dizzo95.
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Speaker: The laser beam is made of coherent light, which gives at many important uses. The term laser itself is an acronym for a late amplification by stimulated emission of radiation. Today, there are many varieties of lasers, but the Ruby laser was the first. At the core of the Ruby laser is a bar of synthetic Ruby, at each end of the bar is a mirror and one of which is transparent enough to allow light to pass. Coiled around the bar is a flash lamp, ordinary light is incoherent with many wave lengths moving in different directions. A laser generates coherent light, which means its ways moving unison at the same wavelength. A light of singular intensity and power. How coherent light is produced begins at the atomic level? The smallest unit of light is a photon, which can emitted from an atom when an electron reduces its energy level. When light is flashed into a Ruby rod, it stimulates the Ruby's atoms, sending it's electrons to a higher energy level. As the light rays balance between the mirrors at each end, more and more atoms are stimulated. When the electrons of the Ruby atoms return to their natural energy state almost at the same time, they release a host of photons of a single wavelength that emerges through the partially transparent mirror in a beam of coherent light. Lasers are now used through society from CD player to grocery counter with a bar code on a package is scanned by a laser, which release information both to the cash register and the store's inventory system.