An object is placed in front of a convergin..

Question 1 Report

An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and has a magnification of 2. What is the distance of the object from the lens?

5cm

10cm

30cm

40cm

Answer Details

V = -2u

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

20 = $\frac{u v - 2 u}{u - 2 u}$

u = 10cm

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An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and has a magnification of 2. What is the distance of the obj...