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Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2005

  • question_answer
    White light is passed through a prism whose angle is \[5{}^\circ \]. If the refractive indices for rays of red and blue colors are respectively 1.64 and 1.66, the angle of deviation between the two colors will be

    A)  0.1 degree                        

    B)  0.2 degree

    C)  0.3 degree                        

    D)  0.4 degree

    Correct Answer: A

    Solution :

    Given: \[A={{5}^{o}},\] s\[{{\mu }_{r}}=1.64,\] \[{{\mu }_{b}}=1.66\] \[\therefore \]  Angular dispersion                 \[\theta ({{\mu }_{b}}-{{\mu }_{r}})A=(1.66-1.64){{5}^{o}}={{(0.1)}^{o}}\]


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