Question

the critical angle for turpentine with respect to air is 43 degree. find its refractive index​

Answer 1

Answer:

Sin 43 =0.83

Explanation:

Because the sin of critical angle is refractive index cause due to Snell's law

sin i /sin r = refractive index

in condition of critical angle then sin r is 1 cause the angle of refraction is 90 so sin 90 is 1 therefore the sin i equals refractive index then i is critical angle.

the critical angle given is 43 degree so

sin 43 is  0.83