Total Internal Reflection

Every object can be classified as Transparent: Objects that light to pass through completely, Translucent: Objects that allow light to pass through partially and Opaque: Objects that do not allow light to pass through them.        Transparent objects have a special property called Internal Reflection. This property is because of the fact that light bends when it travels from one medium to another or simply, when it refracts....

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Reflection

Reflection is a phenomenon in which the wave that strikes a material, returns back to the same medium. The fact that we are able to see ourselves in the mirror is because the light ray that is incident on it, reflects back. Reflection is seen not only in electromagnetic radiations, but also in sound. Echoes are the best example for reflection of sound. Reflection of light: Refraction of light is of two types. Either specular or diffuse. Specular Specular: is...

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Light

Light is a form of energy is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. Light itself is invisible but other things visible. The range of visible light in terms of wavelength is from 400nm to 800nm and in terms of frequency is from 400 THz to 800 THz. Light is emitted as tiny packets of quanta. This quanta is called photon. Light behaves as...

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Pulsars

 Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation. The radiation can only be observed when the beam of emission is pointing towards the Earth. This is called the lighthouse effect and gives rise to the pulsed nature that gives pulsars their name. Because neutron stars are very dense objects, the rotation period and thus the interval between observed pulses is very regular....

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Black Hole

A black hole is a region of space from which nothing, not even light, can escape.  It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics.Black holes of stellar mass are expected to form when heavy stars collapse in a supernova at the end of their life cycle. After a black hole has formed it can...

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