What's the relativity theory of Einstain?

Question

I know that the time travel was theoretical proven with the relativity theory of Einstain but I don't know it. I want to know it and to understand it too. If you can explain it I'm very glad.

Answer 1

The theory holds that the passage of time is relative to the velocity of the observer. As an observer's velocity increases, time will slow down, so that, for example, if you left earth and travelled for 10 years at near light speed before returning, at least 100 years would have passed at home. Some therorists have suggested that if one could travel faster than the speed of light, one could actually reverse time and travel back in the past. This has been used in movies like Superman and Star Trek, but Einstein believed that nothing could travel faster than light.

Answer 2

Special relativity is a theory of the structure of spacetime. It was introduced in Albert Einstein's 1905 paper "On the Electrodynamics of Moving Bodies". Special relativity is based on two postulates which are contradictory in classical mechanics:

The laws of physics are the same for all observers in uniform motion relative to one another (Galileo's principle of relativity),
The speed of light in a vacuum is the same for all observers, regardless of their relative motion or of the motion of the source of the light.
The resultant theory has many surprising consequences. Some of these are:

Time dilation: Moving clocks tick slower than an observer's "stationary" clock.
Length contraction: Objects are observed to be shortened in the direction that they are moving with respect to the observer.
Relativity of simultaneity: two events that appear simultaneous to an observer A will not be simultaneous to an observer B if B is moving with respect to A.
Mass-energy equivalence: per the relationship E = mc², energy and mass are equivalent and transmutable.
The defining feature of special relativity is the replacement of the Galilean transformations of classical mechanics by the Lorentz transformations.

Answer 3

in einstein's own words." if u sit with a pretty gal one hour seems like a minute but if u sit with ur hand on ur stove one minute seems like an hour.. thats relativity" Einstein's first major contribution to the study of time occurred when he revolutionized physics with his "special theory of relativity" by showing how time changes with motion. Today, scientists do not see problems of time or motion as "absolute" with a single correct answer. Because time is relative to the speed one is traveling at, there can never be a clock at the center of the universe to which everyone can set their watches. Your entire life is the blink of an eye to an alien traveling close to the speed of light. Today, Newtonian mechanics have become a special case within Einstein's theory of relativity. Einstein's relativity will eventually become a subset of a new science more comprehensive in its description of the fabric of our universe.

Answer 4

It was not theoretically proven. Einstein fixed the speed of light as a constant. The theory says nothing can travel faster than the speed of light, so the math works out that if you plug in a speed for something that happens to be faster than the speed of light, you would have to go backwards in time.

Think about travelling some distance in some amount of time; the faster you go, the less time it takes. When you go faster than the speed of light, you are, in effect, travelling some distance in less than 0 seconds (i.e., negative seconds, or negative time), which is the same as going backwards in time.

Answer 5

What was general relativity? Einstein's earlier theory of time and space, special relativity, proposed that distance and time are not absolute. The ticking rate of a clock depends on the motion of the observer of that clock; likewise for the length of a "yardstick." Published in 1915, general relativity proposed that gravity, as well as motion, can affect the intervals of time and of space. The key idea of general relativity, called the equivalence principle, is that gravity pulling in one direction is completely equivalent to an acceleration in the opposite direction. A car accelerating forwards feels just like sideways gravity pushing you back against your seat. An elevator accelerating upwards feels just like gravity pushing you into the floor.
If gravity is equivalent to acceleration, and if motion affects measurements of time and space (as shown in special relativity), then it follows that gravity does so as well. In particular, the gravity of any mass, such as our sun, has the effect of warping the space and time around it. For example, the angles of a triangle no longer add up to 180 degrees, and clocks tick more slowly the closer they are to a gravitational mass like the sun.
Many of the predictions of general relativity, such as the bending of starlight by gravity and a tiny shift in the orbit of the planet Mercury, have been quantitatively confirmed by experiment. Two of the strangest predictions, impossible ever to completely confirm, are the existence of black holes and the effect of gravity on the universe as a whole (cosmology).
The development of general relativity began with the equivalence principle, under which the states of accelerated motion and being at rest in a gravitational field (for example when standing on the surface of the Earth) are physically identical. The upshot of this is that free fall is inertial motion: In other words an object in free fall is falling because that is how objects move when there is no force being exerted on them, instead of this being due to the force of gravity as is the case in classical mechanics. This is incompatible with classical mechanics and special relativity because in those theories inertially moving objects cannot accelerate with respect to each other, but objects in free fall do so. To resolve this difficulty Einstein first proposed that spacetime is curved. In 1915, he devised the Einstein field equations which relate the curvature of spacetime with the mass, energy, and momentum within it.

Answer 6

The basic theory is that energy is equal to the mass multiplied by the speed of light squared or E = mc^2. There are other aspects to it as well.

http://en.wikipedia.org/wiki/Theory_of_relativity

Answer 7

Einstain was a famous chemist. He was the guy that invented oxyclean (you can see their infomercials). He stated that one could use the relative color of the fabric around the stain to help make the stain go away. That is his theory of relativity.

Answer 8

E=mc2
Energy=mass, times, the speed of light, squared

Answer 9

http://en.wikipedia.org/wiki/Theory_of_relativity