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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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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)