A thin convex lens has focal length 20 cm an object is
Question: A thin convex lens has focal length 20 cm. An object is placed 40 cm from the lens.
Part A: What is the magnification of the image?
Please show me how work it out above question.
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question a thin convex lens has focal length 20 cm an object is placed 40 cm from the lenspart a what is the
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