alleryFoucault measured the speed of light in water in 1850. He found it was:
AImpossible to find
BSlower than in air
CFaster than in air
DEqual to that in air
Answer & Solution
Correct answer: B. Slower than in air
1. The two models disagreed about speed in water.
2. Foucault's experiment settled it.
3. Light is slower in water, as the wave model said.
_Source: syllabus Physics Part II, Chapter 10, Wave Optics._
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