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  5. Light - Reflection and Refraction

10th Class Science Light - Reflection and Refraction Question Bank Light

  • question_answer
    A ray of light passes through an equilateral prism (refractive index = 1.5) such that the angle of incidence is equal to the angle of emergence and the latter is equal to 3/4 th the angle of the prism. The angle of deviation is

    A) \[20{}^\circ \]

    B)        \[39{}^\circ \]

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

    D)        \[30{}^\circ \]  

    Correct Answer: D

    Solution :

                    \[i=e=(3/4)A=(3/4)\times 60=45\] \[\therefore \]  \[\delta =i+e-A=45+45-60=30\]


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