Question

obatain a equation for critical angle.​

Answer 1

Explanation:

The Formula for Critical Angle

The critical angle is that of θ c r i c θ_{cric} θcric which gives a value of exactly 90 degrees.

Answer 2

Explanation:

θcrit = sin-1(nr/ni) = sin-1(1.3/1.52) = 1.064rad. θcrit = 1.064rad. 2)A ray of light strikes from a medium (n = 1.67) on a surface of separation with the air (n = 1). It calculates the limit or critical angle.