Published by:
CGP EDU Academic Team
Published on: September 13, 2026
In two separate Young's double-slit experimental set-ups and two monochromatic light sources of different wavelengths are used to get fringes of equal width. The ratios of the slits separations and that of the wavelengths of light used are 
and 
respectively. The corresponding ratio of the distances between the slits and the respective screens ( 
) is 
.
Text Solution
Verified by ExpertsThe correct answer is:
4
(4) Fringe width in double slit: 
Given: 
and 
, with equal fringe widths
For equal fringe widths: 
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