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Which describes Einstein’s second postulate about the special theory of relativity? The speed of light in a vacuum is constant, and nothing is faster than the speed of light. The speed of light in a vacuum is constant, and some things are faster than the speed of light. The speed of light in a vacuum fluctuates, but nothing is faster than the speed of light. The speed of light in a vacuum fluctuates, and some things are faster than the speed of light.

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Answer: A)The speed of light in a vacuum is constant, and nothing is faster than the speed of light.

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Answered Correctly on Edg.

User Mejobloggs
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Answer:A

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User Fabiolimace
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