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  5. Light - Reflection and Refraction

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

  • question_answer
    The radius of curvature of a spherical mirror is 30 cm. What is its focal length?

    A) 10 cm                                   

    B) 15 cm                   

    C) 20 cm                                  

    D) 25 cm

    Correct Answer: B

    Solution :

    \[f=\frac{R}{2}=\frac{30}{2}=15\,cm\]


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