Question

the critical angle for daimond is​

Answer 1

Answer:

24.4º

Total internal reflection, coupled with a large index of refraction, explains why diamonds sparkle more than other materials. The critical angle for a diamond-to-air surface is only 24.4º, and so when light enters a diamond, it has trouble getting back out.

Answer 2

24.4º is the critical angle for diamond.

This means that when a light ray is incident inside a diamond at an angle greater than 24.4°, the light will be totally refracted.