Relation between Einstein's Coefficients A & B Laser Physics| Einstein's coefficient significance

हैल्लो फ्यूचर लीडर्स Einstein's coefficient for laser action i.e. relation between Einstein's Coefficients A & B is derived. Laser Physics fundamentals are also discussed in this video. Einstein introduced A and B coefficients to describe Absorption, spontaneous emission and stimulated emission. Einstein proposed rate equation for absorption, rate equation for spontaneous emission and rate equation for stimulated emission. Always remember that the Einstein A coefficient is related to the rate of spontaneous emission of light, and the Einstein B coefficient is related to the absorption and stimulated emission of light. Einstein coefficient of laser engineering physics is an important topic for university exams.
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► About this video:
The helium-neon laser was the first continuous wave (CW) laser ever constructed. It was built in 1961 by Ali Javan, Bennett, and Herriott at Bell Telephone Laboratories. In this video you will learn that B21 is the coefficient for the stimulated emission while B12 is the coefficient for stimulated absorption and both the processes are mutually reverse processes and their probabilities are equal, hence B12 = B21. Einstein coefficients are mathematical quantities which are a measure of the probability of absorption or emission of light by an atom or molecule. This video is very useful for graduation physics courses like engineering physics AKTU students, BSc Physics in hindi students, and all other who need to know about this topic. This topics is the most important topic of Physics for various universities like BHU Banaras Hindu University, Varanasi, Delhi University, IIT Physics, Indian Institute of Technology (IIT) Bombay, Indian Institute of Science (IISc) – Bangalore, Tata Institute of Fundamental Research (TIFR) Mumbai, Mumbai University, Lucknow University, AMU Aligarh,
This video will help to understand the topics related to
LASER
Rate equations in laser physics
Thermal equilibrium in laser
rate equation of absorption
laser fundamental physics
Einstein's Laser concepts
einstein coefficient of laser engineering physics
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