CUET · PHYSICS · PYQ PAPER 2025
The refractive indices of glass and water are 3/2 and 4/3, respectively. If light passes from glass to water, the critical angle is
- A \( \sin^{-1}(8/9) \)
- B \( \sin^{-1}(7/8) \)
- C \( \sin^{-1}(10/9) \)
- D \( \sin^{-1}(9/8) \)
Answer & Solution
Correct Answer
(A) \( \sin^{-1}(8/9) \)
Step-by-step Solution
Detailed explanation
\( \sin \theta_c = \frac{n_2}{n_1} \) \( \sin \theta_c = \frac{4/3}{3/2} = \frac{4}{3} \times \frac{2}{3} \) \( \sin \theta_c = \frac{8}{9} \) \( \theta_c = \sin^{-1}(8/9) \)
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