The question has a paragraph followed by two statements, Statement - 1 and Sstatement - 2. Of the given four alternatives after the statements, choose the one that describes the statements. A thin air film is formed by putting the convex surface of a plane - convex lens over a planeglass plate. With monochromatic light, this film gives an interference pattern due to light reflected from the top (convex) surface and the bottom (glass plate) surface of the film. Statement - 1: When light reflects from the air - glass plate interface, the reflected wave suffers a phase changing of pi. Statement - 2 : The centre of the interference pattern is dark.

The question has a paragraph followed by two statements, Statement - 1

1.	The question has a paragraph followed by two statements, Statement - 1 and Sstatement - 2. Of the given four alternatives after the statements, choose the one that describes the statements. A thin air film is formed by putting the convex surface of a plane - convex lens over a planeglass plate. With monochromatic light, this film gives an interference pattern due to light reflected from the top (convex) surface and the bottom (glass plate) surface of the film. Statement - 1: When light reflects from the air - glass plate interface, the reflected wave suffers a phase changing of pi. Statement - 2 : The centre of the interference pattern is dark.
Answer» Statement -1 is true, statement -2 is true, Statement - 2 is the correct EXPLANANTION of Statement - 1. Statement -1 is true, statement -2is true, Statement - 2 is not the correct explanation of Statement - 1. Statement -1 is FALSE, Statement -2 is true. Statement - 1 is true, Statement -2 is false. Solution :As light enters from AIR to glass it suffers a PHASE change of `pi` and therefore at centre, there will be destructive interference.

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