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March 25, 2017

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An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.

  • Physics - ,

    Learn the lens equation and apply it.

    1/do + 1/di = 1/f

    do is the object distance = 4 cm
    di is the image distance
    f is the focal length = 3 cm

    If di is positive, the image is real.

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