FACULTY OF ENGINEERING & TECHNOLOGY

DEPARTMENT OF APPLIED SCIENCE& HUMANITIES

ENGINEERING PHYSICS(TAS-202)

UNIT II

Laser- Characteristics of Laser light, Stimulated and spontaneous emission. Einstein's

coefficients, Relative contribution of stimulated and spontaneous emissions, Population

inversion, Laser emission, Ruby and He-Ne lasers.

Dr.Alka Mishra

Assistant Professor