Question

A ray of light travelling from a rectangular glass block of refractive index 1.5 into air strikes the block at an angle of incidence of 30 degree. Calculate it's angle if refraction

Answer 1

Answer:

48.6°

Explanation:

The light ray is travelling from glass to air. The refractive index (n) will therefore be

$\frac{1}{1.5}$

From Snell's law,

$n = \frac{sin \: i}{sin \: r}$

$\frac{1}{1.5} = \frac{sin \: 30}{sin \: r}$