Question

Total internal reflection Conclusion and Recommendation​

Answer 1

Explanation:

sin(x1)/sin(x2) = n2/n1

if x1 is the incident beam and x2 is the refracted beam. n1 and n2 are the corresponding refractive indexes.

so, if n2 > n1 --> n2/n1 > 1, if furthermor n2 is large enough, it follows that:

n2/n1 * sin(x2) = sin(x1) > 1 which cannot hold for any real x1. Thus you have total reflection.