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JEE Main & Advanced Physics Ray Optics Sample Paper Topic Test - Reflection of Light

  • question_answer
    A rod 1.5 m long is placed along the principal axis of a convex mirror of focal length 60 cm. The near end of the rod is 1 m from the pole of the convex mirror. The length of the image of the rod is

    A) 15 cm

    B) 14.44 cm

    C) 6.62 cm

    D) 10.88 cm

    Correct Answer: D

    Solution :

    [d] 
    \[f=+\,60\,cm\]
    \[{{u}_{1}}=-100\,cm\]
    \[{{v}_{1}}=\frac{600}{16}\]
    \[{{u}_{2}}=-250\,cm\]
    Image length \[=\,|{{v}_{2}}-{{v}_{1}}|\]


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