JEE Main 2026 — Ray Optics Question with Solution
JEE Main 2026 (23 January Shift 1)
Question
A thin prism with angle of refractive index 1.72 is combined with another prism of refractive index 1.9 to produce dispersion without deviation. The angle of second prism is .
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
For dispersion without deviation, the condition is .
Substituting values:
The magnitude of the second prism angle is 4°.
Substituting values:
The magnitude of the second prism angle is 4°.
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This is a previous-year question from JEE Main 2026, covering the Ray Optics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.