An object is placed at 10 cm from a thin converging lens of focal length f. Its image is formed 30 cm from the lens on the same side as the object. (20 points) 

(a) What is the focal length? (4 points) 

(b) What are the magnification of the image, the orientation of the image (upright/inverted )

 (c) what kind of image is formed (reduced/magnified, real/virtual, and upright?1nvertedy?

 (d) If the lens is replaced by a thin diverging lens of the same absolute value for the focal length 

(e) Going back to the conv points) where is the image formed? (4 points) image formed, what is the nature of the image (magnified/reduced, real/virtual, and emerging lens, if the object is placed at 20 cm from the lens, where is upright/inverted)?

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