Light is incident on a glass slab making an angle of `30^(@)` with the surface. If the speed of light in air is `3 xx 10^(8) m//s` and the refractive index of glass is 1.5, find:
(i)the angle of refraction.
(ii ) the speed of light in glass.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the angle of incidence
The angle of incidence (i) is given as 30 degrees with respect to the surface. However, we need to find the angle of incidence with respect to the normal. The angle with respect to the normal (i) can be calculated as:
\[ i = 90^\circ - 30^\circ = 60^\circ \]

...