# A doctor examines a mole with a 15.6 cm focal length magnifying glass held 11.7 cm...

A doctor examines a mole with a 15.6 cm focal length magnifying glass held 11.7 cm from the mole.

(a) How far is the image from the lens?

Can you write the thin lens equation which gives a relationship between the focal length of a lens, the object distance, and the image distance? If the image distance is negative, what can you conclude about the image? cm

Is the image real or virtual?

realvirtual

(b) What is its magnification?

(c) How big is the image of a 5.00 mm diameter mole?
mm

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