Complete the sentences to describe the postulates of Einstein’s special theory of relativity.


Einstein’s special theory of relativity has two postulates.


The first postulate states that the laws of physics are the

answer: same

in all uniformly moving reference frames.


The second postulate states that the speed of light in a vacuum has the same value for all

answer: observers

, regardless of the state of

answer: motion of the observer or the source of light.

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