A ray of light is incident on a thin film, As shown in figure, M and N two reflected rays while P and Q are two transmitted rays. Rays N and Q undergo a phase change of `pi`. Correct ordering of the refracting indices is A. `n_(2)gtn_(3)gtn_(1)`B. `n_(3)gtn_(2)gtn_(1)`C. `n_(3)gtn_(1)gtn_(2)`D. none of these the specified changes can not occur

A ray of light is incident on a thin film, As shown in figure, M and N

1.	A ray of light is incident on a thin film, As shown in figure, M and N two reflected rays while P and Q are two transmitted rays. Rays N and Q undergo a phase change of `pi`. Correct ordering of the refracting indices is A. `n_(2)gtn_(3)gtn_(1)`B. `n_(3)gtn_(2)gtn_(1)`C. `n_(3)gtn_(1)gtn_(2)`D. none of these the specified changes can not occur
Answer» Correct Answer - B There is a phase change of x when the ray enters from rarer medium into denser medium, the boundary is called rigid boundary and also no change in phase when it enters into rarer medium.

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