General Science • PhysicsHard
In a Young double-slit experiment using monochromatic light, what happens to the fringe width if the distance between the slits is doubled while keeping all other parameters constant?
A. It is halved✓ Correct Answer
B. It is doubled
C. It remains unchanged
D. It quadruples
💡 Solution & Explanation
The fringe width in a Young double-slit interference pattern is inversely proportional to the separation between the two slits, expressed mathematically as wavelength multiplied by screen distance divided by slit separation. Doubling the slit separation reduces the fringe width by half because the angular separation between interference maxima increases. This wave property provides experimental proof for the wave nature of light.
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