In YSDE, both slits are covered by transparent slab. Upper slit is covered by slab of R.I. 1.5 and
Channel: Doubtnut
Date: 23/08/2020

In YSDE, both slits are covered by transparent slab. Upper slit is covered by slab of R.I. 1.5 and thickness t and lower is  covered by R.I. `4/ 3` and thickness 2t, then central maxima