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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 real image is four times as far from a lens as is the object. What is the object distance, measured in focal lengths? The response must be typed, single spaced, must be in times new roman font (size 12) and m ...
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