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  3. WB JEE Medical

WB JEE Medical WB JEE Medical Solved Paper-2009

  • question_answer
    A 2.0 cm object is placed 15 cm in front of a concave mirror of focal length 10 cm. What is the size and nature of the image?

    A)  4 cm, real                           

    B)  4 cm, virtual

    C)  1.0 cm, real       

    D)  None of these

    Correct Answer: A

    Solution :

                     \[\frac{1}{v}-\frac{1}{15}=\frac{1}{-10}\] \[\Rightarrow \]               \[v=-30\,cm\] \[\therefore \]  \[m=-\frac{v}{u}=-\frac{-30}{15}=2\] So, image size will be 4 cm (real).


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