https://shotonmac.com/why-does-a-light-ray-incident-on-a-rectangular-glass-slab-immersed-in-any-medium-emerges-parallel-to-itself-explain-with-the-help-of-a-diagram-class-10
Why does a light ray incident on a rectangular glass slab immersed in any medium emerges parallel to itself explain with the help of a diagram Class 10?