A situation of population inversion can be related to
A situation of population inversion can be related to Correct Answer LASER
Content:
LASER stands for light amplification by stimulated emission of radiation. A LASER is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The emission generally covers an extremely limited range of visible, infrared, or ultraviolet wavelengths. It works on the principle of Absorption, Spontaneous Emission, Stimulated Emission.
Population inversion is the condition in laser gain medium in which higher-lying energy levels are more strongly populated than a lower-lying level. This does not occur under normal conditions and is achieved by Optical Pumping by a suitable optical wavelength.
Explanation:
A situation of population inversion means when more atoms in a group are in the excited state than lower energy states. This is used in LASER.
Additional Information
- Population inversion can't be achieved in two energy level systems. Three or more energy levels are required.
- Population Inversion can be achieved by following:
- Optical pumping
- Electric discharge or excitation by electrons
- Inelastic atom-atom collisions
- Thermal pumping
- Chemical reactions
