MHT CET 2022 Physics question
Two lights rays having the same wavelength in vacuum are in phase initially. Then the first ray travels a path L through a medium of refractive index , while the second ray travels a path of length L through a medium of refractive index . The two waves are then combined to observe interference. The phase difference between two waves is
Answer: (C)
Solution
The phase difference is (optical path difference), where optical path = refractive index geometric path (the wavelength in vacuum is ). The optical path of the first ray is and of the
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