Question

The refractive index of a material is 2 ,then the critical angle is ​

Answer 1

Answer:

45∘

Explanation:

If C is critical angle, then

sinC= 1/n where n is refractive index of the material.

Now, n = root 2

, therefore ,

sinC= 1/root 2

Then, C =45∘

Answer 2

Explanation:

The angle is said to be a critical angle, when the ratio between angle of incidence and angle of refraction is 90°. Therefore the refractive index of the liquid is 2 when their critical angle is 30°.