Reflection of Light Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound and water waves. The law of reflection says that for specular reflection the angle at which … Read more
Last Updated: March 19, 2026 at 8:51 pmRefraction of Light Refraction is the bending of a wave when it enters a medium where it’s speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The amount of bending depends on … Read more
Last Updated: March 19, 2026 at 8:51 pmOptical Instrument When you use an optical device, it is something very simple like a magnifying glass, or more compound such as a telescope or a microscope, you’re usually trying to make things more so that you can more easily see the fine details. One thing to remember in this regard is that if you want to … Read more
Last Updated: March 19, 2026 at 8:51 pmWave Theory of Light Wave Theory of Light Light is part of the electromagnetic spectrum, the spectrum is the collection of all waves, which include visible light, Microwaves, radio waves ( AM, FM, SW ), X-Rays, and Gamma Rays. In the late 1600s, important questions were raised, asking if light is made up of particles, … Read more
Last Updated: March 19, 2026 at 8:51 pmElectron And Photon Electron And Photon A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation, and the carrier of the force by electromagnetic, although static through virtual photon force. The effects of this force are easily observable, both microscopic macroscopic level, since the photon has no mass … Read more
Last Updated: March 19, 2026 at 8:51 pmAtom The atom is a basic unit of matter that consists of a dense central nucleus surrounded by a cloud of negatively charged electrons. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons (except in the case of hydrogen-1, which is the only stable nuclide with no neutrons). The electrons … Read more
Last Updated: March 19, 2026 at 8:12 pmTheory Of Relativity and Astrophysics The theory of relativity, or simply relativity, generally encompasses two theories of Albert Einstein: special relativity and general relativity. (The word relativity can also be used in the context of an older theory, that of Galilean invariance.) Concepts introduced by the theories of relativity include: Measurements of various quantities are … Read more
Last Updated: March 19, 2026 at 8:12 pmLaws Of Rotational Motion (Part-2) Laws Of Rotational Motion (Part-2) Perpendicular axis theorem: The moment of inertia of a plane lamina about an axis perpendicular to the plane is equal to the sum of the moments of inertia about two mutually perpendicular axis in the plane of the lamina such that the three mutually perpendicular … Read more
Last Updated: March 19, 2026 at 8:10 pmLaws of Rotational Motion (Part-1) Laws of Rotational Motion (Part-1) Introduction: From Newton’s first law we know that everybody at rest or in linear motion tries to resist the change of stat because of inertia. Increase or decrease of inertia takes place with the corresponding increase or decrease of mass of body. Like linear motion … Read more
Last Updated: March 19, 2026 at 8:05 pm