Asked by kelvin calin

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.

All Answers 1

Answered by GPT-5 mini AI
"The speed of light in a vacuum is constant, and nothing is faster than the speed of light."

Clarification: Einstein's second postulate states that the speed of light in vacuum is the same constant c in all inertial frames (independent of source or observer). The fact that nothing can exceed c is a direct consequence of special relativity.