Physics

The group of high energy particles, which move closely to the speed of light is the cosmic ray. These rays are generating…

The entropy of a substance is a real quantity, just like pressure, volume and temperature. Its unit is joule/Kelvin (J/K).

A crystal is a solid whose constituent atoms, ions or molecules are closely packed in a regular fashion with repeating pattern in three dimensions.

Nanotechnology is dealing with the characterization, design, production and various applications of nanostructures and nanosystems.

Nanotechnology have considered as the solution to our smallest to biggest problems. Applications of Nanotechnology are countless.

Ampere’s circuital law is one of the general laws of magnetism. This law used to find the magnetic field due to current distribution.

Thermodynamics is the branch of physics which deals with heat and other forms of energy and also gives relationships between them.

Drude and Lorentz gave classical free electron theory of metals theory in 1900. Another name for this is Drude –Lorentz theory of metals.

Faraday’s law gives the idea about how an electromotive force comes into action when a magnetic field interacts with an electric circuit.

In 1895, German physicist Wilhelm Roentgen discovered X-rays. X-rays are electromagnetic in nature and application of X-rays are innumerable.

W. L. Bragg gave a simple explanation for the study of crystal structure by using the phenomenon of diffraction and name it is as Bragg’s law.

Bravais lattice gives information of the periodic array in which the repeated units of the crystal are arranged.

Shock waves are strong pressure waves in any elastic medium like water, solid or air. Supersonic aircraft or lightning produce Shock waves.

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.

CRO or Cathode Ray Oscilloscope displays and measures the electrical signals, time intervals and phase shift between two electrical signals.

Pumping is the process to achieve population inversion .

Rate of Stimulated emission depends upon the number of atoms present in the excited state as well as the energy density of photons.

The number of atoms present in the excited state is greater than the number of atoms in the ground state is called population inversion.

Simple Harmonic Motion (SHM) is when the restoring force is directly proportional to the displacement of the body from its mean position.

In 1960, Maiman constructed the Ruby laser. It is a three-level solid-state laser and is emitting red light of wavelength 694.3 nm.

Magnetic Hysteresis Curve represents the relation between magnetizing force (H) and magnetic flux intensity for ferromagnetic material.

Total internal reflection is the complete reflection of a ray of light within the medium.

First posulate of Special theory of relativity is “The laws of physics take the same form in all inertial frames”.

Most solid materials show elastic behaviour to a lesser or greater extent.

Plasticity is the property of the material by virtue of which it does not regain its original shape when applied force is removed.

Quantum mechanics is dealing with the behaviour of matter and light on the atomic and subatomic level.

Undergoing deformation following two terms describe the forces on objects. Stress and strain.

The laser light exhibits some peculiar properties compared with the conventional light which make it unique.

Lorentz transformation gives the relationship between two different coordinate frames moving at a constant velocity w.r.t. to each other.

According to the De-Broglie concept, with each moving particle a wave is associated.