Physics

Physics

Problem

Calculate the image distance produced by a thin convex lens of focal length 20 cm when an object is placed 60 cm in front of it. Distances measured in the direction of incident light are taken as positive. a) +15 cm+15\text{ cm} b) −30 cm-30\text{ cm} c) +30 cm+30\text{ cm} d) −15 cm-15\text{ cm}

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