Question

Give relation between optical path length and geometrical path length.Answer the given question in brief.

Answer 1

Explanation:

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Answer 2

Answer:

Explanation:

The geometric path length is the length of an object measured for an instant thickness gauge by an equipment. Whereas the length of the optical path is evaluated using electromagnetic wave (or light) where the sample refractive index needs to be understood.

For example, if some dielectric slab has a D thickness (or geometric path length of d) and n as the refractive index, then the optical path length is a product of d and n. Usually n>1, so optical length of trajectory > geometric length of trajectory.