If half of reflecting surface of upper part of mirror is painted black, choose correct options from the following

Intensity of maxima and minima will increase

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Intensity at minima will increase and at maxima, intensity will decrease

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Intensity at minima will remain zero and at maxima, intensity will decrease

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Intensity at maxima remains unchanged but at minima, intensity will increase

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Solution

The correct option is B Intensity at minima will increase and at maxima, intensity will decrease
As half reflecting surface of one part is painted black then intensity of one source will decrease so intensity at maxima will decrease and at minima it will increase (when intensity of both sources is same then there is zero intensity at minima).

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If half of reflecting surface of upper part of mirror is painted black then choose correct option

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