Question

If the critical angle for a material to air is 30° then refractive index of the material will be...

Answer 1

Answer:

if the critical angle for a material to air is 30° then refractive index of the material will be...

Step-by-step explanation:

You have not given enough information to say for sure. The critical angle depends on the refractive index on both sides of the interface. The equation for the critical angle is

θc=sin−1(n2n1)

Since you have only specified the angle θc=30∘, the only thing you can do is solve for n2/n1.

n2n1=sin(θc)=sin(30∘)=0.5

Now, if I assume that the second medium is air so n2 = 1.0, we can get a value for n1.

n1=n20.5=1.00.5=2.0