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J & K CET Engineering J and K - CET Engineering Solved Paper-2014

  • question_answer
    The angle of a prism is \[{{42}^{o}}\] and refractive index of its material is\[3/2\]. Then, angle of minimum deviation for this prism is

    A)  \[{{63}^{o}}\]   

    B)  \[{{42}^{o}}\]    

    C)  \[{{28}^{o}}\]    

    D)  \[{{21}^{o}}\]

    Correct Answer: D

    Solution :

    Angle of minimum deviation \[{{\delta }_{\min }}=(\mu -1)A\] \[=\left( \frac{3}{2}-1 \right){{42}^{o}}\] \[=\frac{1}{2}\times 42\] \[={{21}^{o}}\]


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