Masers and Lasers

Hello Guys , I want to know What is a MASER and LASERS ? , Can you polzz provide me Details of same ?

[Shaleen]

MASER Stands for Microwave Amplification by Stimulation Emission of Radiation.


A LASER is a MASER that works with Higher Frequency Photons in the Ultraviolet or visible light Spectrum (photons are bundles of electromagnetic energy commonly thought of as "Rays of Light" which travel in oscillating waves of various wavelengths) .

LASER

Laser is the Abbreviation for “Light amplification by Stimulated Emission of Radiation”.

Laser light is emitted when many atoms undergo similar energy transitions at the same time. This is achieved by promoting a large number of atoms to an energy level above the ground state.

As an electron in one of the excited atoms jumps down from its higher energy level it emits a photon. As this photon travels past another atom in an excited state, it causes the electron in this atom to jump down to the lower level. The passage of light thus stimulates the emission of radiation from other atoms – producing the intense beam of light characteristic of the laser.



Physics Syllabus Masers and Lasers