Optics and Light Properties

Phase modulation is commonly used in high-speed optical communication systems due to its high bandwidth efficiency and resilience to noise.

Nanoelectronics is a journal dedicated to the publication of research on the use of Nanotechnology in electronic devices and systems.

Total internal reflection is the phenomenon of the reflection of light from a surface at an angle greater than the critical angle. The critical angle is the angle at which light is refracted at 90 degrees. When light is incident on a surface at an angle greater than the critical angle, it is totally reflected back into the medium from which it came.

Second harmonic generation is the phenomenon of the generation of light at twice the frequency of the incident light. This occurs when light is incident on a nonlinear optical material. A nonlinear optical material is a material that has a nonlinear relationship between the electric field and the polarization. When light is incident on a nonlinear optical material, the electric field of the light wave interacts with the electrons in the material and causes them to vibrate. The vibration of the electrons generates light at twice the frequency of the incident light.

Stimulated emission is the phenomenon of the emission of light by an atom or molecule when it is stimulated by another photon. This occurs when an atom or molecule is in an excited state and it is struck by a photon that has the same energy as the energy difference between the excited state and the ground state. The photon stimulates the atom or molecule to emit a photon that is identical to the stimulating photon. This process is the basis for the operation of lasers.

Optical solitons are light waves that propagate in a nonlinear optical medium without distortion. This is possible because the nonlinearity of the medium balances the dispersion of the medium. Dispersion is the spreading out of light waves as they propagate. In a linear optical medium, dispersion causes light waves to spread out as they propagate. However, in a nonlinear optical medium, the nonlinearity of the medium can counteract the dispersion and prevent the light waves from spreading out.

The discovery of stimulated emission in the 1960s led to the development of the laser, a device that amplifies light waves and produces a highly focused and coherent beam with numerous applications in science, technology, and medicine.

The discovery of the electromagnetic spectrum, with its visible light range, paved the way for the development of color photography.

The Kapala Yantra uses the principle of reflection of light to measure the position of celestial bodies.

Visible light, a small portion of the electromagnetic spectrum, is responsible for the colors we perceive.

Emission refers to the process where atoms or molecules absorb electromagnetic radiation and subsequently release it as photons.

Refraction is the phenomenon where electromagnetic radiation bends when it passes from one medium to another with different optical densities.

Scattering refers to the phenomenon where electromagnetic radiation is deflected from its original path due to interactions with particles in the medium.

Infrared radiation is utilized in night vision devices to enable vision in low-light conditions.

Size constancy is the ability to see objects as being the same size, even when they are at different distances. This process is made possible by the fact that our brains are able to take into account the distance of an object when judging its size.