The graph shows how the magnification m produced by a convex thin lens varies with image distance v. What was the focal length of the used [DPMT 1995]

The graph shows how the magnification m produced by a convex thin lens

1.	The graph shows how the magnification m produced by a convex thin lens varies with image distance v. What was the focal length of the used [DPMT 1995]
A.	\[\frac{b}{c}\]
B.	\[\frac{b}{ca}\]
C.	- 4 V
D.	\[\frac{c}{b}\]
Answer» E.

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The graph shows how the magnification m produced by a convex thin lens varies with image distance v. What was the focal length of the used [DPMT 1995]

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