The image formed by a converging lens of focal length is ...
The image formed by a converging lens of focal length is of a distance of 2f from the lens. Calculate the lateral magnification produced
0.5
1
1.5
2
3
Correct answer is B
Using the lens formula,
1v+1u=1f
Where u, v and f are the object distance, image distance and focal length respectively.
∴
\frac{1}{u} = \frac{1}{2f} - \frac{1}{f} \implies \frac{1}{u} = \frac{1}{2f}
u = 2f
\therefore Magnification = \frac{\text{image distance}}{\text{object distance}}
= \frac{2f}{2f}
= 1
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