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    Physics
    General
    Easy

    Question

    A spherical mirror forms an erect image three times the linear size of the object. If the distance between the object and the image is 80 cm , What is the focal length of the mirror

    1. 30 cm
    2. 40 cm
    3. -15 cm
    4. 15 em

    The correct answer is: 30 cm

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