Question: What is the critical angle for total internal reflection from water (n = 1.33) to air (n = 1)?
Options:
Correct Answer: 53.1 degrees
Solution:
The critical angle (θc) can be calculated using sin(θc) = n2/n1. Thus, sin(θc) = 1/1.33, giving θc ≈ 53.1 degrees.