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An object 2 cm tall is placed 20 cm in front of a converging lens that has a focal length of 15 cm. (a) Calculate

An object 2 cm tall is placed 20 cm in front of a converging lens that has a focal length of 15 cm.

(a) Calculate the image position and height.

(b) Where the object should be placed if the image is at 30 cm behind the lens?

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