A near-sighted person might correct his vision by wearing, Ask an Expert

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A near-sighted person might correct his vision by wearing diverging lenses with focal length f = 60 cm. When wearing his glasses, he looks not at actual objects but at the virtual images of those objects formed by his glasses. Suppose he looks at a 10-cm-long pencil held vertically 1.5 m from his glasses. WHAT IS THE HEIGHT? the image distance and focal length should be negative!

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