See Our New JEE Book on Amazon

**Question:**
NAEST 2020: Refraction from a Glass Slab Optics

Treat the lighted path on the paper after the slit as a narrow light beam. The paper is fixed on a horizontal table. Let A be the point where the light falls on the slab and B be the point from where the light emerges from the slab. The normal to the surface of the slab

- is vertical at A and horizontal at B
- is vertical at B and horizontal at A
- is horizontal both at A and at B
- is vertical both at A and at B

- $x = y = z$
- $x = y \neq z$
- $x \neq y = z$
- $x \neq y, y \neq z$

See Our Books