1.

In a YDSE setup, the distance between the plane of the slits and the screen is increased by 20% and the distance between the slits is increased by 50%. Then the percentage change in fringe width is

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In a YDSE setup, the distance between the plane of the slits and the screen is increased by 20% and the distance between the slits is increased by 50%. Then the percentage change in fringe width is



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