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A lens with f = 4 cm is used as a magnifying glass as shown below...

A lens with f = 4 cm is used as a magnifying glass as shown below to image a small object of height

0.5 cm. The magnifying lens is being used by a person whose vision near point is 25 cm. The vision

near point is the closest point the person can focus his eyes on a object without using a magnifying

glass.

(a) The object is initially 2.4 cm from the lens as

shown at right. What kind of image will the

lens produce, real or virtual?

(b) Solve for the distance of the image from the lens

and draw its approximate position on the diagram at right.

(c) Where should the objective be placed to put a

virtual image 15 cm behind the lens?

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