Introduction of Population Inversion for BTech 1 Year Physics Students: We use Population Inversion to Achieve Amplification Metastable states, where the lifetime of the atoms are of the order of…
Year: 2014
Stimulated Emission of Radiation
The incident photon interacts with the atom and may cause the atom to come to lower state along with an emission of a photon. This process is called stimulated emission.…
Spontaneous Emission of Radiation
When an atom jumps from a higher energy stated to a lower energy state it emits light in the form of photons. In any source of light, the light that…
Fundamentals of Modern Optics for Engineering Physics 1st Year
What is Optics? Optics is the branch of physics which involves the behavior and properties of light, including its interactions with matter and the construction of instruments that use or…
Retardation Plate Theory for Engineering Physics B.Tech 1st Year
Overview: What is Retardation Plate? A retardation plate is an optically transparent material which resolves a beam of polarized light into two orthogonal components; retards the phase of one component…
Circular and Elliptical Polarized Light
Understanding Polarization Light is an electromagnetic wave, and the electric field of this wave oscillates perpendicularly to the direction of propagation. If the direction of the electric field of light…
Principle of Nicol Prism Engineering Physics B.Tech 1st Year
What is Nicol Prism? Nicol prism is an optical device which is used for producing and analyzing plane polarized light in practice. Principle of Nicol Prism: Nicol Prism is based…
Phenomena of Double Refraction
Double refraction is an optical property in which a single ray of unpolarized light when entering an anisotropic medium is split in two rays, each following a different direction. One…