Question

A Ray of light is incident on a glass slab at an angle of 45 degree. if refractive index of Glass be 1.6 what is the angle of refraction ​

Answer 1

Answer: 26 degree

Explanation:

n = sin i/sin r

n = 1.6

1.6 = sin 45/sin r

sin r = (1/root 2)/1.6

sin r = 10/23

sin r = 0.43

Therefore, r = 26 degree.

Answer 2

The angle of refraction of the ray of light is 26.22 degrees.

Explanation:

It is given that,

Angle of incidence of the ray on a glass slab is 45 degrees

The refractive index of the glass is 1.6

We need to find the angle of refraction. Let r is the angle of refraction. It can be calculated using Snell's law such that,

$n=\dfrac{sin\ i}{sin\ r}$

$sin\ r=\dfrac{sin\ i}{n}$

$sin\ r=\dfrac{sin(45)}{1.6}$

$sin\ r=0.4419$

r = 26.22 degrees

So, the angle of refraction of the ray of light is 26.22 degrees. Hence, this is then required solution.

Learn more,

Snell's law

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