3. In the figure shown in a YDSE, a parallel beam of light is incident on the slits from a medium of refractive index . The wavelength of light in this medium is . A transparent slab of thickness 't' and refractive index n3 is put in front of one slit. The medium between the screen and the plane of the slits in n2 . The phase difference between the light waves reaching point O (Symmetrical, relative to the slits) is:
Dear student,
So option (A) is correct
So option (A) is correct
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