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NEET Sample Paper NEET Sample Test Paper-67

  • question_answer
    A ray of light strikes a plane mirror M at an angle of \[45{}^\circ \] as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.5 whose apex angle is\[4{}^\circ \]. The total angle through which the ray is deviated is

    A) \[90{}^\circ \]

    B) \[91{}^\circ \]

    C) \[92{}^\circ \]

    D) \[93{}^\circ \]

    Correct Answer: C

    Solution :

    \[{{\delta }_{ray}}={{\delta }_{mirror}}={{\delta }_{prism}}\] \[-\,(180-2i)\,\,+\,\,(\mu -1)\text{A}\] \[= \left( 180 - 2 \times  45 \right) + \left( 1.5 - 1 \right) \times  4 = 92{}^\circ \]


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