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8th Class Science Light Question Bank Self Test-1

  • question_answer
    The two lens of different power are given as shown below in the figure. When both the lens is placed in contact with each other, the focal length of the combined lens is:

    A) 20 diopter

    B)  22 diopter

    C) 24 diopter

    D)  16 diopter

    E) None of these

    Correct Answer: C

    Solution :


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