Youtor
How LASERs work Animation with Einstein
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=1LmcUaWuYao
http://www.bring-knowledge-to-the-wor... • The stimulated emission of light was a discovery by Einstein around 1916. All we need is an atom, which possesses electrons just like any other atom in our world and a photon, that is: a quantum of light. • Contents • 1) Energy levels of atoms and electrons • 2) Absorbing energy in the form of photons • 3) Stimulated and spontaneous emission • 4) Photons with same phase, frequency, polarization, direction • 5) Parts of a LASER device (reflectors, gain medium) • 6) Chain reaction for coherent and monochromatic light • 7) Population inversion (ground state vs. excited state)
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