Embibe Experts Solutions for Exercise 3: EXERCISE 9.3

In the shown figure $\angle r$ is equal to

A ray of light strikes a glass plate at an angle $60°$. If reflected and refracted rays are perpendicular to each other, then refractive index of the glass will be

To an underwater swimmer at depth $12$ below the surface of water a bird at height $18 \mathrm{m}$ above the surface of water appears at height $h$ above the surface of water, then $h$ is equal to

If a parallel beam of light of circular cross-section having radius $10 \mathrm{mm}$ falls on the surface of glass slab $\left(\mu =\frac{3}{2}\right)$ at an angle $30°$ with the surface of slab, then the radius of refracted beam is about

In the path of a beam converging towards a point on screen a glass plate of thickness $t$ is placed. The convergence point will shift by $[\mu \to$ refractive index of material of slab$]$