Question Bank NAT • 1 Mark Section 3: Electromagnetic Theory Electromagnetic Theory - Module 4

QB_PH_087: Electromagnetic Theory - Module 4

Question Statement

The critical angle for total internal reflection from water ($n_1 = 4/3$) to air ($n_2 = 1$) satisfies $\sin(\theta_c) = 3/4$. The critical angle in degrees is approximately:
Correct Answer
48.4, 48.8
Verified Key

Step-by-Step KaTeX Derivation & Detailed Explanation

### Solution: $\arcsin(0.75) \approx 48.59^\circ$.
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