Physics

Physics

Problem

An object is placed 25 cm in front of a thin lens and a real, inverted image is obtained 50 cm from the lens on the opposite side. Calculate the focal length of the lens. a) −50 cm-50\ \text{cm} b) +12.5 cm+12.5\ \text{cm} c) +16.7 cm+16.7\ \text{cm} d) −16.7 cm-16.7\ \text{cm}

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