In Young ’ s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths 
and 
. At what minimum distance from the common central bright fringe on the screen 2 
from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other7.
Text Solution
Verified by ExpertsThe correct answer is:
D
: Let 
bright fringe of 
coincides with 
bright fringe of 
. Then
or 
Let 
be given distance.
Here, 
mm 
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