The Michelson–Morley experiment is important for the history of physics.
PHYSICS · Multi-part · A Level · Physics · Turning points in physics · Turning points in physics
Problem
The Michelson–Morley experiment is important for the history of physics.
(1) Sketch a diagram of the apparatus used by Michelson and Morley. Add rays of light to show how an interference pattern is formed for the observer.
(2) In part of the experiment, the whole set of apparatus was rotated through 90∘. Why did Michelson and Morley do this?
(3) Explain the purpose of the moveable mirror.
(4) What did Michelson and Morley notice from their results?
(5) Explain how their results helped to confirm what Einstein and Maxwell had predicted for the speed of light.