KCET · Physics · Ray Optics
Two beams of red and violet colours are made to pass separately through a prism of \(\mathrm{A}=60^{\circ}\). In the minimum deviation position, the angle of refraction inside the prism will be
- A greater for red colour
- B equal but not \(30^{\circ}\) for both the colours
- C greater for violet colour
- D \(30^{\circ}\) for both the colours
Answer & Solution
Correct Answer
(D) \(30^{\circ}\) for both the colours
Step-by-step Solution
Detailed explanation
Here, Angle of prism, \(A=60^{\circ}\)
For minimum deviation, \(\mathrm{A}=2 \mathrm{r}\) or \(r=\frac{A}{2}=\frac{60^{\circ}}{2}=30^{\circ}\) for both colours.
For minimum deviation, \(\mathrm{A}=2 \mathrm{r}\) or \(r=\frac{A}{2}=\frac{60^{\circ}}{2}=30^{\circ}\) for both colours.
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