On using red light 
in Young's double slit experiment, 60 fringes are observed in the field of view. If violet light 
is used, the number of fringes observed will be
Text Solution
Verified by ExpertsThe correct answer is:
D
If 
fringes are visible in a field of view with light of wavelength 
while 
with light of wavelength 
in the same field, then
Here, 
,
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