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Lasers
Laser's in one of the topics and sub topics in the branch of physics such as Engineering Physics and Applied Physics. Not only in B.Tech but many science related courses. Laser's play a vital role in the electromagnetic spectrum and the basic concept...See more
of emission. The PDF starts with simple definition of laser leaning towards emissions. Construction of lasers such as Ruby Laser, He-Ne (Helium Neon) Laser, Semi Conductor Laser with their construction, working principle to advantages and disadvantages. Einsteins Coefficients is also clearly described.
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