It is Physics

Black hole are the regions in spacetime where the gravitational pull is so strong that nothing, not even light can escape from it. Black hole is obviously black, but that doesn't mean it is nothing. Actually it reflects no light, hence its black. The term black hole was coined by John Wheeler. In my previous posts, i told you that Gravity is the result of curved spacetime and Light also follows the path of spacetime. In simple terms, Light is also affected by Gravity. Every region has fixed Escape Velocity, the minimum velocity required to escape the planet's gravitational pull. So, Black hole is the region where the escape velocity is more than Speed of Light, and According to Special Relativity, nothing can travel with or faster than Speed of light, Hence nothing can escape Black Hole. Such regions can only be formed when massive thing is compressed into very very small sphere, where density approaches infinity. Such regions are also called Singularity. The ...

Space and time are not two different entities they are fused and considered as one, according to Special Relativity, called Spacetime. In previous post i said that Gravity is the result of spacetime. Now, i will put some light on this idea of General Relativity, that how it works. Spacetime is a fabric of universe in which all bodies moves. Matter curves the spacetime, And if there is no matter, that spacetime is called flat spacetime. Suppose that a body is moving from A to B in straight line in flat spacetime. If there comes a curvature in spacetime due to any mass, then the path from A to B will also be bend in the same way as Spacetime is bend. Think Spacetime as trampoline, if i put one ball on trampoline, it will be bend, and if i put a small ball in motion around that ball, that ball will follow the path of trampoline (just like revolving around that big ball) Using this Idea, i will explain motion of Earth around Sun. Our sun curves spacetime, if there is no sun then O...

Hello guys It is a General introduction to general relativity. General relativity theory was given by Albert Einstein after 16 years of Special relativity. General theory of relativity is a Theory of gravity. Before that there was Newton's theory of gravity. Newton told that every matter in the universe attract each other with the force of gravity that force of gravity is directly proportional to the product of the masses and inversely proportional to the square of distance between them. There was a problem with this theory of gravity that this theory of gravity couldn't explain why does matter attracts, means how matter attract each other. what is the reason behind that attraction. Suppose I have to attract an apple on ground I have to make a contact with the Apple to attract it but gravity attract everything without any contact. So how that works was the problem behind the Newton's theory of gravity. So our one genius named Albert Einstein figured out this proble...