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     EduGorilla 
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    A thin rod of length 10 cm is placed along the axis of a concave mirror of focal length 30 cm such that its real image just touches the rod. What is the length of the image?

    Options :-

    1. 5 cm
    2. 15 cm
    3. 25 cm
    4. 75 cm
    5. 45 cm
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