JEE Advanced · Physics · 24. Ray Optics
Two beams of red and violet colours are made to pass separately through a prism (angle of the prism is \(60^{\circ}\) ). In the position of minimum deviation, the angle of refraction will be
- A \(30^{\circ}\) for both the colours
- B greater for the violet colour
- C greater for the red colour
- D equal but not \(30^{\circ}\) for both the colours
Answer & Solution
Correct Answer
(A) \(30^{\circ}\) for both the colours
Step-by-step Solution
Detailed explanation
At minimum deviation \(\left(\delta=\delta_m\right)\) :
\(
r_1=r_2=\frac{A}{2}=\frac{60^{\circ}}{2}=30^{\circ}
\)
(For both colours)
\(\therefore\) correct answer is (a).
\(
r_1=r_2=\frac{A}{2}=\frac{60^{\circ}}{2}=30^{\circ}
\)
(For both colours)
\(\therefore\) correct answer is (a).
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