JEE Main 2013 — Ray Optics Question with Solution
JEE Main 2013 (23 Apr Online)
Question
A light ray falls on a square glass slab as shown in the diagram. The index of refraction of the glass, if total internal reflection is to occur at the vertical face, is equal to :
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
At point A by Snell's law
At point , for total internal reflection,
From figure, Now From eqs (ii) and (iii) Squaring both sides and then solving, we get
From figure, Now From eqs (ii) and (iii) Squaring both sides and then solving, we get
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This is a previous-year question from JEE Main 2013, 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.