1. A basic postulate of Einstein\'s theory of relativity is: (a) Moving clocks r

Question

1. A basic postulate of Einstein's theory of relativity is: (a) Moving clocks run more slowly than when they are at rest (b)Moving rods are shorter than when they are at rest (c) Light has both wave and particle properties (d)The laws of physics must be the same for observers moving with uniform velocity relative to each other 2. The spaceship U.S.S. Enterprise, traveling through the galaxy, sends out a smaller explorer craft that travels to a nearby planet and signals its finding back. The proper time for the tip to the planet is measured by clocks: (a) On board the Enterprise (b) On board the explorer craft (c) On Earth (d) At the center of the galaxy (e) None of the above

Explanation / Answer

1)

Einstein in 1905 formulated this special theory of relativity on the basis of following postulates:

The first postulate implies that not only the laws of mechanics but also that of electrodynamics and optics should be same for all inertial reference systems. There is no privileged frame like ether or absolute space.

So from the given options, the correct one is:

(d) The laws of physics must be the same for observers moving with uniform velocity relative to each other.

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