Help pleasee An object is placed 12.5 cm from a lens of focal length 22.0 cm. What is the image distance?

Question

Help pleasee
An object is placed 12.5 cm from
a lens of focal length 22.0 cm.
What is the image distance?

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Kiệt Gia 7 months 2021-08-09T19:34:15+00:00 1 Answers 5 views 0

Answers ( )

  1. trungdung22
    0
    2021-08-09T19:36:02+00:00
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    Answer:

    i/f = i/o + i/i       f = focal, o = object, i = image

    1 / i = 1 / f – 1 / o  =    (o – f) / o f

    i = o * f / ( o – f)      image distance

    i = 12.5 * 22 / (12.5 – 22) = -28.9 cm

    Image is real

    Image is 28.9 cm to left of lens

    M = – i / o = = 28.9 / 12.5 = 2.3     magnification (convex lens)

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