Question

what do you mean by optical path? derive the necessary formula​

Answer 1

Answer:

In optics, optical path length (OPL) or optical distance is the product of the geometric length of the path followed by light through a given system, and the refractive index of the medium through which it propagates. In many textbooks, it is symbolically written as Λ.

Answer 2

Answer:

MARK AS BRAINLIEST

The path that a light ray follows as it passes through an optical medium or system is often called the optical path. ... The optical path length as defined in optics is the length of the path multiplied by the refractive index of the medium

Formula used:

do=n×dg where do is the optical path length, n is the refractive index of the medium and dg is the actual path length or the geometric length.