To obtain a magnification of 2.5, how far s..

Question 1 Report

To obtain a magnification of 2.5, how far should an object be placed from the pole of a thin converging lens of focal length 10.20m?

0.13m

0.25m

0.28m

0.50m

Answer Details

v = 2.5u

F = $\frac{u v}{u + v}$

0.2 = $\frac{u \times 2.5 u}{u + 2.5 u}$

u = 0.28m