In an experiment with a rectangular glass slab, for an angle of incidence of `60^@` in air,
Channel: Doubtnut
Date: 26/07/2020

In an experiment with a rectangular glass slab, for an angle of incidence of `60^@` in air, angle of refraction is measured to be `r_1`. When the glass slab is replaced by a hollow slab filled with water, angle of refraction is measured to be `r_2`. Show that `r_2 gt r_1`. Justify your answer.