Refraction through a Rectangular Glass Slab

Q.

A ray of light is incident on a glass-slab from air at an angle . Thickness and refractive index of glass-slab are‘t’ and ‘${\mu }_a$ ’ respectively, Find the lateral displacement of the emergent ray respective to incident ray.

1. 2 cm

2. 3 cm

3. 1 cm

4. 5 cm

Q.

Find the value of $\sin {\theta }_{glass}$ in the diagram given below.
Given:
$n_{glass}=1.5$

1. $\frac{\sqrt{3}}{2}$
2. $\frac{1}{\sqrt{3}}$
3. $\frac{1}{\sqrt{2}}$
4. $\sqrt{2}$

Q. What is optical medium?
What ate its kinds?

Q. A pencil partly immersed in water in a glass tumbler appears to be bent or broken because:

1. Pencil and water react and the light direction changes.
2. Light ray does not travel in the same direction in all media.
3. Dispersion occurs in water.
4. Glass tumbler creates an optical illusion.