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Question

The fringe width in a Young's double slit experiment can be increased if we decrease

A
width of slits
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B
separation of slits
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C
wavelength of light used
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D
distance between slits and screen
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Solution

The correct option is A width of slits
β=λDd

So by increasing d, that is width of slits, we can decrease fringe width.

Answer. A) width of slits.

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