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Minima in Diffraction

Young's doubl...

Question

Young's double slit experiment is performed with monochromatic light. A thin film is introduced in front of the slits then:

A

Intensity at the position of central maxima must decrease

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B

Intensity at the position of central maxima must increase

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C

Central maxima may remain unshifted

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D

Intensity at position of first maxima may decrease

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Solution

The correct option is A Intensity at the position of central maxima must decrease
Young's double-slit experiment is performed with monochromatic light. A thin film is introduced in the path of the slit then, the intensity at the position of central maxima must decrease because the light intensity coming from the slit decreases when the thin film is introduced.
So, the correct option is option (A).

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