Lasers :: laser lasers

Since boyhood flair wondered about blank. He would wonder about its speed, and how it works. In fact most of Einsteins work involved light in someway or another(prenominal). (Guillen) So of course when S.N.Bose sent Einstein a paper on light being a gas consisting of photons, Einstein was very interested. Boses paper was more like a bunch of questions. For example he noticed that photons didnt behave like statistical billiard balls. Billiard balls that atomic number 18 shaken on a table will eventual fall in some pocket. But photons tended to fall in to one pocket if another photon was ready there. (Forward) Einstein and Bose continued to work together on photons and noticed that one photon was indistinguishable from another photon. This let Einstein and Bose to conclude that strange behaviour or photons was just statistical probability. (Forward)For example if I have the set of numbers 1,2,3 There are 6 subsets if all(prenominal) position is unique1,2 1,3 2,32 ,1 3,1 3,2solely if position doesnt matter then there are only 3 subsets1,2 2,3 1,3Since 1,2 is the same as 2,1Using this idea and many other ideas Einstein situated the foundations for the laser by theorizing about the stimulated emission of radiation. His idea was that if you had a large number of atoms full of excess energy, and they were ready to emit a photon at some random time in some random direction, if a stray photon passed by, then the atoms are stimulated by its presence, and each atom whitethorn emit there photon early. This new photon would have the same direction and the same frequency as the original photon Repeating this process with more and more photons each time is what gives us a lasers. (Forward)Einstein did not actual build the first laser. The first laser would not be created till 1954 by Townes. He called his invention a M.A.S.E.R. Microwave Amplification by Stimulated Emission of Radiation. but skeptics read it as Means of Acquiring Suppor t for Expensive explore (Talbot) Townes first used Microwave energy to create resonance in ammonia, if the power input was really large, the ammonia would emit energy . Most plenty dont consider this a laser, since it was using Microwave energy to stimulate the atoms to change energy levels, but the maser did stimulate the research that lead to the laser.