What is full form LASER? What is principle of laser? What is the formula for rate of absorption? What is the formula for rate of spontaneous emission? What is the formula for rate... What is full form LASER? What is principle of laser? What is the formula for rate of absorption? What is the formula for rate of spontaneous emission? What is the formula for rate of stimulated emission? What is the ratio of spontaneous and stimulated emission rates? What is population inversion? What is pumping? What is meant by optical pumping? What is meant by electrical pumping? What is meant by direct conversion? What is meant by lasing? What is life time of laser in atom? What is metastable state in laser in atom? What is meant by active medium? What is meant by optical resonator? What are the components of basic laser system? What is pumping source in Ruby laser? What are the active canters in Ruby laser? What are the dimensions of Ruby rod in Ruby laser? Why coolant is required in Ruby laser? What are the dimensions of quartz tube in He-Ne laser? What is the pressure proportion of helium and neon in laser? What are the characteristics of laser? Explain spontaneous emission with figure in laser. Explain absorption with figure in laser. Explain stimulated emission with figure in laser. Give any two differences between stimulated emission and spontaneous emission. How laser classified based on active medium and pumping method? What are the general applications of laser? Write the characteristics of laser in detail. Derive the ratio of spontaneous and stimulated emission rates. Give any four differences between stimulated emission and spontaneous emission. Mention various application of laser. What are the general applications of laser? Write short note on Ruby laser. Write short note on He-Ne laser. Read more