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Drude and Lorentz gave classical free electron theory of metals theory in 1900. Another name for this is Drude –Lorentz theory of metals.
The group of high energy particles, which move closely to the speed of light is the …
The entropy of a substance is a real quantity, just like pressure, volume and temperature. Its unit is joule/Kelvin (J/K).
Diffraction can be defined as bending of light when it passes around the edge of an object.
Plasticity is the property of the material by virtue of which it does not regain its original shape when applied force is removed.
Lorentz transformation gives the relationship between two different coordinate frames moving at a constant velocity w.r.t. to each other.
First posulate of Special theory of relativity is "The laws of physics take the same form in all inertial frames".
The process of converting unpolarized light into polarized light is known as polarization.
Total internal reflection is the complete reflection of a ray of light within the medium.
The phenomenon of Raman scattering of light was experimentally observed in 1928 by Raman and Krishnan.
Helium-Neon Laser laser is a gas laser. In this a mixture of helium and neon gas is used as a gain medium. It was the first continuous-wave laser.
Thermodynamics is the branch of physics which deals with heat and other forms of energy and also gives relationships between them.