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...

Assessment: JAMB UTME - Physics - 1994 Subject: Physics

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?
Answer Details
V = -2u

F =  u v u + v

20 =  u v − 2 u u − 2 u

u = 10cm

Read lesson note on Electrostatics (JAMB)
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