In a double slit experiment the angular width of a fringe is found to be 0.2 0 on a screen placed I m away. The wavelength of light used is 600nm. The angular width of the fringe if entire experimental apparatus is immersed in water is 
Text Solution
Verified by ExpertsThe correct answer is:
A
Since a fringe of width 
is formed on the screen at distance D from the slits, so the angular fringe width
If the wavelength in water be 
and the angular fringe width be 
then
Or 
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