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

question 52

Multiple Choice

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.

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