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BVP Medical BVP Medical Solved Paper-2002

  • question_answer
    A ray of monochromatic light is incident on one refracting face of a prism of angle \[75{}^\circ \]. It passes through the prism and is incident on the other face at the critical angle. If the refractive index of the material of prism is \[\sqrt{2,}\], the angle of incidence on the first face of the prism is :

    A)  \[0{}^\circ \]                                     

    B)  \[60{}^\circ \]

    C)  \[45{}^\circ \]                                  

    D)  \[30{}^\circ \]

    Correct Answer: C

    Solution :

                    For critical angle \[Sin\,\,C=\frac{1}{\mu }\] \[\sin \,C=\frac{1}{\sqrt{2}}=\sin {{45}^{o}}\] \[C={{45}^{o}}\] it means angle of emergence \[e={{45}^{o}}\] For prism angle of incident I = \[e={{45}^{o}}\]


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