A cylindrical wave front ABC centred at O symmetric about BE

Last updated: 6/24/2023

A cylindrical wave front ABC centred at O symmetric about BE is incident on slits S S BS S O 82 where is wavelength of light used A slab of thickness t and refractive index 4 is placed in front of one of the slits to obtain central maxima at point D symmetrically located with respect to slits If t is least then A B S 37 S O D D E 1 Light emitted by slit S leads with respect to the light emitted by slit S by phase of 2 Light emitted by slit S lags with respect to the light emitted by slit S by phase of 4t