Question

what is theory of Relativity??Give one example. ​

Answer 1

If the speed of light is always the same, it means that an astronaut going very fast relative to the Earth will measure the seconds ticking by slower than an Earthbound observer will — time essentially slows down for the astronaut, a phenomenon called time dilation.

Answer 2

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According to the theory of general relativity, matter causes space to curve. It is posited that gravitation is not a force, as understood by Newtonian physics, but a curved field (an area of space under the influence of a force) in the space-time continuum that is actually created by the presence of mass. According to Einstein, that theory could be tested by measuring the deflection of starlight traveling near the sun; he correctly asserted that light deflection would be twice that expected by Newton's laws.

The special theory of relativity was based on two main postulates:

• 1. The speed of light is constant for all observers; and

• 2. Observers moving at constant speeds should be subject to the same physical laws.

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