A ray of light travels from water (µ = 1.33) to air — JEE Physics
A ray of light travels from water ($\mu = 1.33$) to air. Find the critical angle for total internal reflection.
1 Answer
VAVidaara Admin
✓ Vidaara Team
✓ Accepted
· 24d ago
▲ 35
$$\sin\theta_c = \frac{1}{\mu} = \frac{1}{1.33}$$
$$\theta_c = \sin^{-1}(0.752) \approx 48.8°$$
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Discussion (2)
PP
Is there a faster shortcut for this in the actual exam? Time is tight.
MP
Pro tip: memorise the standard result, it reappears in many problems.