English, asked by ruliakter7, 7 months ago

calculate the ratio ofSpontaneous to Stimulated emission

Answers

Answered by arnabchakraborty14
0

Answer:

What a question.. ...

supper hero bro....

Answered by satvikaprime
1

Answer:

A laser is an oscillator that operates at very high frequencies. These optical frequencies range to values several orders of magnitude higher than

can be achieved by the “conventional” approaches of solid-state electronics or electron tube technology. In common with electronic circuit

oscillators, a laser is constructed from an amplifier with an appropriate amount of positive feedback. The acronym LASER, which stands

for light amplification by stimulated emission of radiation, is in reality

therefore a slight misnomer†.

In this chapter we shall consider the fundamental processes whereby

amplification at optical frequencies can be obtained. These processes

involve the fundamental atomic nature of matter. At the atomic level

matter is not a continuum, it is composed of discrete particles — atoms,

molecules or ions. These particles have energies that can have only

certain discrete values. This discreteness or quantization, of energy is

intimately connected with the duality that exists in nature. Light sometimes behaves as if it were a wave and in other circumstances it behaves

as if it were composed of particles. These particles, called photons, carry

the discrete packets of energy associated with the wave. For light of frequency ν the energy of each photon is hν, where h is Planck’s constant

— 6.6 × 10−34 J s. The energy hν is the quantum of energy associated

Similar questions