physics

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A converging lens (f = 12.6 cm) is held 8.55 cm in front of a newspaper, the print size of which has a height of 2.10 mm.

(a) Find the image distance (in cm),

(b) The height (in mm) of the magnified print.

  • physics -

    (a) Use 1/do + 1/di = 1/f
    with f = 12.6 and do = 8.55
    Solve for di (image distance)

    (b) Image height = 2.1 mm * di/do

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