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Physics · PYQ NEET UG 2020
हिन्दीIn Young’s double slit experiment, if the separation between coherent sources is halved and the distance of the screen from the coherent sources is doubled, then the fringe width becomes:
Correct answer · Option 2
four times
Explanation
Fringe width \( \beta = \frac{\lambda D}{d} \). When \( d' = d/2 \) and \( D' = 2D \), \( \beta' = \frac{\lambda (2D)}{d/2} = 4 (\frac{\lambda D}{d}) = 4\beta \).
