JEE Main 2019 — Ray Optics Question with Solution
JEE Main 2019 (11 Jan Shift 1)
Question
The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the correct one, if is the angle of minimum deviation?
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
When angle of prism is small, then angle of deviation
is given by
So, if wavelength of incident light is increased, decreases
and hence decreases.
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This is a previous-year question from JEE Main 2019, 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.