Q. A wave has velocity v in medium P and velocity 2v in medium 𝒬. If the wave is incident in medium P at an angle of 30°, then the angle of refraction will be
A) 30°
B) 45°
C) 60°
D) 90°
Explanation
(d) $\mu = \frac{\sin i}{\sin r} = \frac{v_{1}}{v_{2}}$
$\Longrightarrow \sin r = \sin{30{^\circ} \times \frac{2v}{v}} \Longrightarrow \sin{r = \frac{1}{2} \times 2 \times 1}$
$\Longrightarrow r = 90{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.