What was Einstein's main reason for proposing the principle of the constancy of lightspeed?
A) The Michelson- Morley experiment showed that every observer observes the same speed for any lightbeam.
B) He believed that conservation of energy should be obeyed in every nonaccelerated reference frame.
C) His own observations of such simple phenomena as reflection and refraction convinced him that light must have the same speed for all observers.
D) This principle followed from his conclusions regarding the relativity of time and space.
E) He believed that Maxwell's theory of electromagnetism should obey the principle of relativity.

Question

Quizplus · Accepted Answer

Einstein proposed the constancy of the speed of light because he believed that Maxwell's equations, which describe electromagnetism, should hold true in all inertial frames, consistent with the principle of relativity.

What Was Einstein's Main Reason for Proposing the Principle of the Constancy