Question

a ray of light travelling in air falls on the surface of a plastic slab at an angle. If the angle of refraction is ३०° and the Refractive index of the plastic is √3 find the angle of incidence​

Answer 1

Answer:

Angle of refraction = 30 degrees = r

Refractive Index = √ 3

Let, Angle of Incidence = i

We know that,

Refractive index = sin i / sin r

So, √ 3 = sin i / sin 30

So, √ 3 = sin i / ( 1 / 2)

So, sin i = √ 3 / 2

So, i = 60 degrees

Hence, angle of incidence is 60 degrees

Answer 2

Answer:30°

Step-by-step explanation:

the angle of incidence is equal to the angle of refraction