Question

Which of the following were one of the conclusions of the Michaelson Morley experiment?

(a) All laws of physics remain invariant in all inertial frames

(b) Light propagates with different speeds in different directions

(c) Ether has no observable properties

(d) The velocity of light in free space is constant

This question was posed to me during an interview.

I'm obligated to ask this question of Michelson in portion Ultrasonics & Relativity of Engineering Physics I

Answer 1

Correct answer is (c) Ether has no observable properties

For explanation I would say: In Michaelson Morley experiment, the aim was to find the time difference from which the relative velocity between ether and the earth could be estimated. However, no shift was observed. Hence it proved, that ether has no observable properties and that velocity of light is same in all directions.