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JEE Main & Advanced Sample Paper JEE Main Sample Paper-12

  • question_answer
    A glass prism is immersed in a hypothetical liquid. The curves showing the refractive index n as a function of wavelength X for glass and liquid are as shown in the figure. A ray of white light is incident on the prism parallel to the base. Choose the incorrect statement

    A)  yellow ray travels without deviation

    B)  blue ray is deviated towards the vertex

    C)  red ray is deviated towards the base

    D)  there is no dispersion

    Correct Answer: D

    Solution :

     n for liquid = n for glass for yellow light But n for liquid < n for glass (red light) \[\therefore \]deviated towards base Similarly, n for liquid > n for glass (blue light) \[\therefore \]deviated towards vertex.


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