Question

If angle of incidence is 30 and refractive index is 1.5, find the angle of refraction.

Answer 1

Step-by-step explanation:

Refractive index = sin i / sin r

=> 1.5 = sin 30° /sin r

Value of sin 30° is 1/2

=> sin r = 1/2 ÷ 1.5

=> sin r = 1/2 × 10/15

=> sin r = 1/3

=> r= $\sin ^{− 1}$ 0.33 = 19.47°

So the required angle is 19.47°