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An object is placed 10cm from a converging lens of foal l...

An object is placed 10cm from a converging lens of foal length 15cm. Calculate the magnification of the image formed

A.

3.0

B.

1.5

C.

0.6

D.

0.3

Correct answer is C

* produces a virtual image when object distance(u) is less than its focal length(f).

1f=1u1v

1v=1f+1u

115+110=2+330

1v=530

v = 6.0 cm 

but m = vu=610=0.6

Note that the negative sign only shows the placement of the image. It has no effect on the magnification basically.