what is theory of relativity?'?

Answer 1

The special theory of relativity postulates that, for all observers moving at constant velocity relative to one another, a) the laws of physics are the same, b) the speed of light is the same. On the basis of these simple premises, a number of conclusions can be derived, including length contraction, time dilation and mass increase at near-light speeds. The most well-known of them is the equivalence of mass and energy : E = mc^2. Also, space-time is revealed as a four-dimensional continuum.

While the special theory of relativity deals with constant velocities, the general theory of relativity deals with accelerating systems. Its cornerstone is the principle of equivalence, which states that an accelerating system behaves in all respects as though it were being subjected to a gravitational force. The main conclusion is that gravity is really a result of curvature in the space-time continuum caused by the presence of massive bodies.

Answer 2

The theory of relativity states that only the speed of light is the absolute quantity in the universe. In fact , the time and the mass of a body are not absolute in universe. There are two theories of relativity. Please elucidate further your question. Tell me whether you want to know about the general theory of relativity or the special theory of relativity.

Answer 3

Relativity of time and space. When you're in a spacecraft moving near the speed of life, time inside the spacecraft becomes slower than the outside. So If you return back to earth after a year, there will be a huge difference between your clock and the outside world's clock. Some say that moving at the speed of light turns back time.

Answer 4

Newton's laws of motion give us a complete description of the behavior moving objects at low speeds. The laws are different at speeds reached by the particles at SLAC.

Einstein's Special Theory of Relativity describes the motion of particles moving at close to the speed of light. In fact, it gives the correct laws of motion for any particle. This doesn't mean Newton was wrong, his equations are contained within the relativistic equations. Newton's "laws" provide a very good approximate form, valid when v is much less than c. For particles moving at slow speeds (very much less than the speed of light), the differences between Einstein's laws of motion and those derived by Newton are tiny. That's why relativity doesn't play a large role in everyday life. Einstein's theory supercedes Newton's, but Newton's theory provides a very good approximation for objects moving at everyday speeds.

Einstein's theory is now very well established as the correct description of motion of relativistic objects, that is those traveling at a significant fraction of the speed of light.

Because most of us have little experience with objects moving at speeds near the speed of light, Einstein's predictions may seem strange. However, many years of high energy physics experiments have thoroughly tested Einstein's theory and shown that it fits all results to date.

Theoretical Basis for Special Relativity
Einstein's theory of special relativity results from two statements -- the two basic postulates of special relativity:

The speed of light is the same for all observers, no matter what their relative speeds.
The laws of physics are the same in any inertial (that is, non-accelerated) frame of reference. This means that the laws of physics observed by a hypothetical observer traveling with a relativistic particle must be the same as those observed by an observer who is stationary in the laboratory.
Given these two statements, Einstein showed how definitions of momentum and energy must be refined and how quantities such as length and time must change from one observer to another in order to get consistent results for physical quantities such as particle half-life. To decide whether his postulates are a correct theory of nature, physicists test whether the predictions of Einstein's theory match observations. Indeed many such tests have been made -- and the answers Einstein gave are right every time!

Answer 5

theory of einstine which relates time and speed in forth dimention by this theory it is possible to travel in future or in past ...

Answer 6

didnt u ever see the movie "young einstien"

its E=MCsquared

Answer 7

e=mc^2

Answer 8

sex