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Result of Relativity - Time Dilation and Length Contraction

Time Dilation The time lapse between two events is not invariant from one observer to another, but is dependent on the relative speeds of the observers' reference frames (e.g., the  twin paradox   which concerns a twin who flies off in a spaceship traveling near the speed of light and returns to discover that his or her twin sibling has aged much more). Suppose a  clock  is at rest in the unprimed system  S . The location of the clock on two different ticks is then characterized by  Δ x  = 0 . To find the relation between the times between these ticks as measured in both systems, the first equation can be used to find: {\displaystyle \Delta t'=\gamma \,\Delta t}     for events satisfying     {\displaystyle \Delta x=0\ .} This shows that the time (Δ t ′) between the two ticks as seen in the frame in which the clock is moving ( S ′), is  longer  than the time (Δ t ) between these ticks as measured in the rest frame of the clock ( S ). Time dilation explains a nu
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What is Special Relativity?

Special relativity is the generally accepted and experimentally well-confirmed physical theory regarding the relationship between space and time. In Albert Einstein's original pedagogical treatment, it is based on two postulates: The laws of physics are invariant (i.e. identical) in all inertial systems (non-accelerating frames of reference). The speed of light in a vacuum is the same for all observers, regardless of the motion of the light source. It was originally proposed in 1905 by Albert Einstein in the paper "On the Electrodynamics of Moving Bodies". The inconsistency of Newtonian mechanics with Maxwell’s equations of electromagnetism and the lack of experimental confirmation for a hypothesized luminiferous aether led to the development of special relativity, which corrects mechanics to handle situations involving motions at a significant fraction of the speed of light (known as relativistic velocities ). As of today, special relativity is the most accurate

A General Introduction to Black Holes

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

Understanding Spacetime and its Curvature

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

Introduction to General Relativity

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