Question

in Michelson interferometer what is the purpose of compensating plate​

Answer 1

Light reflected from the mirror M2 passes through a second glass plate twice, once on the outward journey and once after reflection from M2. This second glass plate is known as the compensating plate, and its function is to make the path of the two rays in glass equal.

I hope my answer is correct and keep it up

Answer 2

Explanation:

Light reflected from the mirror M2 passes through a second glass plate twice, once on the outward journey and once after reflection from M2. This second glass plate is known as the compensating plate, and its function is to make the path of the two rays in glass equal.