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JEE Main & Advanced JEE Main Paper (Held On 11-Jan-2019 Morning)

  • question_answer
    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 \[{{D}_{m}}\] is the angle of minimum deviation? [JEE Main Online Paper (Held On 11-Jan-2019 Morning]

    A)                   

    B)

    C)                  

    D)

    Correct Answer: A

    Solution :

    The angle of minimum deviation\[{{D}_{m}}=(\mu -1)A.\] In the given graph, as the wavelength increases \[\mu \]decreases. Hence, the angle of minimum deviation also decreases.


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