Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first ray travels a path of length 
through a medium of refractive index 
. The second ray travels a path of length 
through a medium of refractive index 
. The two waves are then combined to observe interference effects. The phase difference between the two, when they interference, is -
Text Solution
Verified by ExpertsThe correct answer is:
B
Optical path difference or 
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