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Question

The object distance u, the image distance v and the magnification m in a lens follow certain linear relations. These are

A
1u versus 1v
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B
m versus u
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C
u versus v
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D
m versus 1v
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Solution

The correct option is A 1u versus 1v
For a lens 1f=1v1u1v=1u+1f...(i)
Also m=fvf=1vfm=(1f)v+1...(ii)
On comparing equations (i) and (ii) with y = mx+c
On comparing equations (i) and (ii) with 1v vs 1u and m vs 1v is not linear.

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