Exam-style question
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How did the Michelson-Morley experiment support the concept of constant light speed?.
- A.By measuring light speed in a vacuum.
- B.By showing no variation in light speed due to Earth's motion.
- C.By demonstrating time dilation effects.
- D.By confirming the ether's existence.
Model answer
What a good answer should say
- By showing no variation in light speed due to Earth's motion.
Explanation
Why this works
The experiment's null result showed that light speed remained constant regardless of the Earth's motion through space, reinforcing the principle that the speed of light is invariant in all inertial frames.
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