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When an object is placed at a distance of 60cm from the convex mirror the magnification produced is 0.5. where should the object be placed in order to obtain magnification of .33
Asked by | 27 Oct, 2012, 09:58: PM
answered-by-expert Expert Answer
In case of convex mirror,

In the first part, u=-60cm ,

m=1/2 implies v=30 cm (Since the image must bevirtual)

onlSubstituting in eqn

or 

we get f = 60 cm

In II case

m=1/3=0.33

m=-(v/u)

v=-u/3

f=60cm

substituting in

we get u=-2f=(-2)x 60cm =-120cm

Answered by | 27 Oct, 2012, 11:40: PM

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