Laser Absorption, Spontaneous Stimulated Emission in detail Laser Lecture part 2

Laser Absorption, Spontaneous Stimulated Emission, Population inversion etc discussed in detail in this Lecture part 2
To Watch lecture part 1 Laser with applications of laser, Principle of Laser Action, properties of laser, Main Components of Laser, Brief History and about Dr T.H. Maiman Lecture in hindi link is given below.
https://youtu.be/-sKpM5wRbwc

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Видео Laser Absorption, Spontaneous Stimulated Emission in detail Laser Lecture part 2 канала Technical Physics