Q. 3

Which of the following methods can be used to measure the speed of light in water?
A. Roemer method

B. Fizeau method

C. Foucault method

D. Michelson method

Answer :

Foucault method can be used to measure the speed of light in water. Foucault used a scaled-up version of the rotating mirror apparatus to perform an absolute measurement of the speed of light. Foucault measured the differential speed of light through air versus water by inserting a tube filled with water between the rotating mirror and the distant mirror.

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