what is relativity?

Answer 1

Its a scientific theory created by Albert Einstain. The famous E=MC2 is the bases for this theory. In lame turms relativity is that the experience of time is not allways constant and it is relative to who is experiencing it. As you travel at the speed of light, you may experience 1 hour of travel but you return to earth 1 year has passed (not the actual ratio). So time is relative.

Answer 2

Size,Speed,up and down, and motion are all relative terms.
An object is small or large only if reffered to the size of another object. A cricket ball is much bigger than a ping-pong ball but a lot smaller than a football.
A vehicle is faster or slower only compared to another vehicle. The car is slower than an aeroplane but faster than a cycle.
Up and down positions of an object are also relative.On earth the sky is the up and the ground is the down.But in space there is no up or down for a spacecraft because there is no particular frame of reference.
Motion is also an absolutely relative term. Inside a train at a uniform motion 100km/hr moving south a person is moving north at 5km/hr.For the people inside the train, the person is moving at 5km/hr but for an observer outside the train the person is moving at 95km/hr.
Contact me for more details.

Answer 3

Relativity is a concept so profound to understand though so simple to state.

Einstein realized that there is no absolute reference for anything. Everything that we take for granted is actually a "relative" reference.

You want to know how much you weigh? You have to compare your weight to "standard weights" in the same place at the same time. Remember, if you weigh yourself on Earth, you get a different answer that you would on the Moon. You ALSO get a different answer if you are in space. AND the answer differs if you weigh yourself in space when the engines are firing. Only by comparisons in our same "frame of reference" can we measure weight or mass. (Not counting some of the indirect methods used by astronomers for the estimated mass of distant objects.)

You want to measure your speed? you have to compare your position to some point that isn't part of you. You want to for instance say that when you start a timer at a mile marker and stop it at the next one, you went one mile in x number of seconds and compute it. BUT... those mile markers were not with you, they were external to your localized "frame of reference." AND YET they were moving with you on the moving Earth. So if you left the surface of the Earth far enough to escape its field of gravitational influence and that of the Sun, etc. - your distance would be relative to the motion of the Earth that you are no longer part of and you would get a totaly different answer, even if you really WERE moving at the same speed. (Whatever 'same speed' really means...)

Philosophers and scientists searched for many years to find the ultimate stationary object against which all other distances could be measured. But Einstein showed that there is no such ultimate object of reference. EVERYTHING we measure is relative to something else. We act as though our speed and distance measurements are some really great thing - but they all depend on where we are and how closely connected we are to the things being measured.

This begins to have some really bizarre side effects when things start moving fast. For instance, light can be bent by gravity due to some of the rules of "special relativity" that related to fast moving objects - light being somewhat of an object in this case.

Stated briefly, then, "relativity" means "no primary reference for position or speed" - and it carries tremendous amounts of "baggage" when you try to explore what it implies.

Answer 4

Relativity is using ones relatives in all places

Answer 5

you are pressing the tube of toothpaste for brushing your teeth. as the toothpaste comes out it has a direction and speed...i.e. a motion.... which can be defined as e.g...'coming out of the tube at a rate of 1 cm per sec'
so in terms of relativity ..you can also consider yourself 'entering into the tube at a rate of 1 cm per sec'....thats RELATIVITY in very simple terms


mr einstein above..has given a wrong answer by saying that for the ppl inside the train the speed of man outside is 5 whereas it will also be 105 for both...remember both bodies are moving in opposite direction so their speeds will add up as the distance between them is covered by both....whereas in toothpaste case..you are not moving...itz just the paste which is coming out...

Answer 6

the physical parameters observed from diff reference frames are different such as length, mass, time.
thru this theory a fourth dimension of time comes into play.