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A 5.00 cm tall candle is placed at a distance of 50.0 cm from a double convex lens having a focal length of 15.0 cm. What is the magnification of the image?





  • Physics -

    (1/p) + (1/q) = 1/f
    M = h'/h = -q/p,

    Where p is distance of object from lens, q is distance of image from lens, f is focal length of the lens, and M is the magnification

    f is positive when the lens is convex:

    1/50 + 1/q = 1/15

    q = 21.4 cm
    M = -21.4/50

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