A converging lens has a focal length of 20.0 cm. Locate the image for object dis

Question

A converging lens has a focal length of 20.0 cm. Locate the image for object distances of (a) 40.0 cm, (b) 20.0 cm, and (c) 10.0 cm. For each case, state whether the image is real or virtual and upright or inverted. Find the magnification in each.

Explanation / Answer

A converging lens has a focal length of 20.0 cm. Locate the imagefor object distances of (a) 40.0 cm, (b) 20.0 cm, and (c) 10.0 cm.For each case, state whether the image is real or virtual andupright or inverted. Find the magnification in each. a)1/u+1/v=1/f 1/v=1/f-1/u=1/20-1/40=>v=40cm the image is real andinverted. m=v/u=40/40=1 b)1/v=1/f-1/u=1/20-1/20=>v=infinity the image is real andinverted. the image is not magnified. c)1/v=1/f-1/u=1/20-1/10=>v=-20cm the image is virtual andupright.. m=v/u=20/10=2(the magnitude of the magnification)

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