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In Young's experiment for the interferen...

In Young's experiment for the interference of light, the separation between the slits is d and the distance of the screen from the slits is D. If D is increased by 0.5% and d is decreased by 0.3%, then for the light of a given wavelength, which one of the following is true ?
"The fringe width.........."

A

increases by 0.8%

B

decreases by 0.8%

C

increases by 0.2%

D

decreases by 0.2%

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