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JEE Advanced 2008Paper 1
Exam
JEE Advanced
Year
2008
Paper
Paper 1
Subject
Physics
Chapter
Ray Optics

JEE Advanced 2008 · Paper 1 · Physics · Ray Optics

Two beams of red and violet colours are made to pass separately...

Two beams of red and violet colours are made to pass separately through a prism (angle of the prism is 60∘60^{\circ} ). In the position of minimum deviation, the angle of refraction will be

Options

  1. A30∘30^{\circ} for both the colours
  2. Bgreater for the violet colour
  3. Cgreater for the red colour
  4. Dequal but not 30∘30^{\circ} for both the colours

Correct answer

A. 30∘30^{\circ} for both the colours

Step-by-step solution

At minimum deviation (δ=δm)\left(\delta=\delta_m\right) : r_1=r_2=A2=60∘2=\frac{A}{2}=\frac{60^{{}^{\circ}}}{2}=30^{{}^{\circ}} (For both colours) ∴\therefore correct answer is (a).
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