1.

An object is placed at a distance of 30 cm from the lens. Its image is formed at a distance of 10 cm on the same side of the lens. Find the focal length of the lens used.

Answer»

An object is placed at a distance of 30 cm from the lens. Its image is formed at a distance of 10 cm on the same side of the lens. Find the focal length of the lens used.



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