A ray of light incident on a thin film. As shown in figure M, N are two reflected rays and P, Q are

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A ray of light incident on a thin film. As shown in figure M, N are two reflected rays and P, Q are two transmitted rays, Rays N and Q undergo a phase change of π. Correct ordering of the refracting indices is :

Accepted Answer

There is a phase change of &#956; when the ray enters from rarer medium in to denser medium, the boundary is called rigid boundary and also no change in phase when it enters into rarer medium.

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