Exam-style question
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What was the significance of the null result in the Michelson-Morley experiment?.
- A.It confirmed the existence of the ether
- B.It supported the constancy of the speed of light
- C.It proved that light travels faster in a vacuum
- D.It demonstrated time dilation
Model answer
What a good answer should say
- It supported the constancy of the speed of light
Explanation
Why this works
The null result indicated that light's speed is constant regardless of the motion of the observer or the source, which was a key principle that later supported Einstein's theory of special relativity.
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