Question

A ray of light is travelling from glass to air.The angle of incidence is 30 and refraction is 60. Find the refravtive index of glass with respect to airir

Answer 1

Answer:

1/ root 3

= 0.57(approx)

Answer 2

Answer:

The refractive index of glass with respect to air is $\frac{1}{\sqrt{3} }$.

Explanation:

Refractive index is defined as the ratio of the speed in one medium to that in another medium.

It is the ratio of sin of angle of incidence to angle of refraction.

It is given that $i=30$ and $r=60$

Hence,

Refractive index $=\frac{sin30}{sin60}$

$=\frac{\frac{1}{2} }{\frac{\sqrt{3} }{2} }$

$=\frac{1}{\sqrt{3}}$

Hence, refractive index is $\frac{1}{\sqrt{3} }$

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