Einstein's principle of the constancy of lightspeed and principle of relativity are
A) assumptions which cannot be proven.
B) the basic principles of his theory of relativity.
C) Both of the above.
D) Neither of the above.
E) now known to be false at the microscopic level.

Question

Quizplus · Accepted Answer

Einstein's principles of the constancy of lightspeed and relativity are foundational assumptions of his theory of relativity, and while they are not proven in the traditional sense, they are supported by extensive experimental evidence.

Einstein's Principle of the Constancy of Lightspeed and Principle of Relativity