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    Ans: d
    Why is refractive index of medium maximum on axis of beam? And why is speed of light in medium minimum on axis of beam? Please explain.

  • @anag You didn't provided the complete context of the question:
    Here refractive index was given as a function of intensity for initially paralleled cylindrical beams. As intensity is maximum at the axis ( inversely proportional to radius ) the refractive index would be maximum and hence the speeed will be minimum ( on the axis ) so the rays will converge.
    It's a paragraph question from some JEE Mains paper.

  • @ashish-kumar-tomer this is from Pradeep Objective Physics class 12— chapter wave optics. I have provided the full question given in the book.

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