CUET · PHYSICS · PYQ PAPER 2023
A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to \( \left(\frac{3}{4}\right) \)th of the angle of prism. The angle of deviation is :
- A \( 45^\circ \)
- B \( 70^\circ \)
- C \( 39^\circ \)
- D \( 30^\circ \)
Answer & Solution
Correct Answer
(D) \( 30^\circ \)
Step-by-step Solution
Detailed explanation
\(A = 60^\circ\) \(i = e = \frac{3}{4} A = \frac{3}{4} (60^\circ) = 45^\circ\) \(\delta = i + e - A = 45^\circ + 45^\circ - 60^\circ = 30^\circ\)
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