Can you explain the basics of Einstein's Theory of Relativity in a simple, easily understood way?

Answer 1

insight that gravitation is not due to a force but rather is a manifestation of curved space and time, with this curvature being produced by the mass-energy and momentum content of the space time. General relativity is distinguished from other metric theories of gravitation by its use of the Einstein field equations to relate space time content and space time curvature.
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.

Answer 2

Relaitive motion:
Picture a crowded highway where all the cars are doing 60MPH .
Standing on the road side you see cars moving at a high rate of speed.

If you were driving one of those cars and looked at a car along side that car would apear to not be moving very fast and may even appear not to move if is traveling at the same exact speed.

So apparent motion is relative to how you observe it. (Standing by a road or driving in a car)

Answer 3

Simply put:

Relativity involves a simple transformation between a moving object and an observer in another inertial frame of reference. If you are walking in a moving train, and someone stationary on the ground is watching, your speed relative to the observer will be the sum of your speed relative to the train and the train's speed relative to the observer. You're in one inertial frame of reference, the train itself (and anyone sitting still on it) are in another, and the observer is in still another.

Answer 4

Time travel

Answer 5

E=m.c2