Question

A student measures the focal length of a convex lens by putting an object pin at a distance from the lens and measuring the distance of the image pin. The graph between and plotted by the student should look like

A
option
B
option
C
option
D
option
Medium
Solution
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Correct option is A)

For a convex lens



 The above equation looks like a hyperbola. Hence correct answer is A as negative u gives positive v.

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