Question

Optical path is equal to​

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 index of refraction of the medium through which it propagates

Answer 2

Optical path = path-length x refractive index

Explanation:

The optical path is defined as the product of geometric length of the path and the refractive index of the medium through which it propagates. The difference in optical path lengths between two paths is called optical path difference.

It can be calculated using equation :

$\mathrm {OPD} =d_{1}n_{1}-d_{2}n_{2}$

Here, n₁ is the greater refractive index and  n₂ is the smaller refractive index and the d₁ and d₂ are the distances of the ray passing through medium 1 or 2, and

Optical path = path-length x refractive index

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