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categoryفيزياء schoolبكالوريوس event_available2026-07-13

السؤال

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45 A lens is made of glass having an index of refraction of 1.5. One side of the lens is flat, and the other is convex with a radius of curvature of 20 cm. (a) Find the focal length of the lens. (b) If an object is placed 40 cm in front of the lens, where will the image be lo- cated?

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