2006-08-11 23:29:21 · 5 answers · asked by Brainy 2 in Education & Reference ➔ Other - Education
special relativity is a physical theory of relativity based on the assumption that the speed of light in a vacuum is a constant and the assumption that the laws of physics are invariant in all inertial systems
2006-08-11 23:37:46 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The special theory of relativity was proposed in 1905 by Albert Einstein in his article "On the Electrodynamics of Moving Bodies." Some three centuries earlier, Galileo's principle of relativity had stated that all uniform motion was relative, and that there was no absolute and well-defined state of rest; a person on the deck of a ship may be at rest in his opinion, but someone observing from the shore would say that he was moving. Einstein's theory combines Galilean relativity with the postulate that all observers will always measure the speed of light to be the same no matter what their state of uniform linear motion is.
This theory has a variety of surprising consequences that seem to violate common sense, but which have been verified experimentally. Special relativity overthrows Newtonian notions of absolute space and time by stating that distance and time depend on the observer, and that time and space are perceived differently, depending on the observer. It yields the equivalence of matter and energy, as expressed in the famous equation E=mc2, where c is the speed of light. Special relativity agrees with Newtonian mechanics in their common realm of applicability, in experiments in which all velocities are small compared to the speed of light.
The theory was called "special" because it applies the principle of relativity only to inertial frames. Einstein developed general relativity to apply the principle generally, that is, to any frame, and that theory includes the effects of gravity. Special relativity doesn't account for gravity, but it can deal with accelerations.
In particular, it states that the speed of light is the same for all observers, even if they are in motion relative to one another. Special relativity reveals that c is not just the velocity of a certain phenomenon -- light -- but rather a fundamental feature of the way space and time are tied together. In particular, special relativity states that it is impossible for any material object to travel as fast as light.
First postulate - Special principle of relativity - The laws of physics are the same in all inertial frames of reference. By other words, there are no privileged frames of reference.
Second postulate - Invariance of c - The speed of light in a vacuum is a universal constant (c) which is independent of the motion of the light source
2006-08-12 07:09:42 · answer #2 · answered by Mysterious 3 · 0⤊ 0⤋
friend is the special relation that everyone wont miss in life
coz friend indeed is the friend in need
2006-08-12 07:14:53 · answer #3 · answered by RAHUL V 1 · 0⤊ 0⤋
yeah, what he said (the guy before me)
2006-08-12 06:51:56 · answer #4 · answered by Forgiven 3 · 0⤊ 0⤋
comparatively.
2006-08-15 13:58:02 · answer #5 · answered by madhurima 2 · 0⤊ 0⤋