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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 27 - Wave Optics > Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first ray travels a path of length L1 through a median of refractive index μ1. The second ray travels a path of length L2 through a medium of refractive index μ2 . The two waves are then combined to observe interference effects. The phase difference between the two, when they interfere, is

Two light waves having the same wavelength λ in vacuum are in phase initially. Then the first ray travels a path of length L1 through a median of refractive index μ1. The second ray travels a path of length L2 through a medium of refractive index μ2 . The two waves are then combined to observe interference effects. The phase difference between the two, when they interfere, is

In a YDSE with identical slits the intensity at the same point is the intensity of the central bright fringe is I0. If one of the slits is covered