Question

Light travels from a rarer medium 1 to a denser medium 2. The angle of incidence and refraction are respectively 45° and 30°. Calculate the refractive index of second medium with respect to the first medium.

Answer 1

refractive index =sin i/sin r
=sin 45/sin 30
=
$\frac{1}{ \sqrt{2} } \div \frac{1}{2} = \sqrt{2}$