CUET · PHYSICS · PYQ PAPER 2023
The critical angle for light ray going from medium-1 to medium-2 is \(i_c\). What will be the speed of light in medium-2, if its value in medium-1 is \(u\) ?
- A \(\frac{u}{\cos i_c}\)
- B \(u\left(1-\cos i_c\right)\)
- C \(\frac{u}{\sin i_c}\)
- D \(\frac{u}{1-\sin \dot{i}_c}\)
Answer & Solution
Correct Answer
(C) \(\frac{u}{\sin i_c}\)
Step-by-step Solution
Detailed explanation
\(n_1 \sin i_c = n_2 \sin 90^\circ\) \(\frac{c}{u} \sin i_c = \frac{c}{v_2}\) \(v_2 = \frac{u}{\sin i_c}\)
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