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?

Assessment: JAMB UTME - Physics - 1988 Subject: Physics

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?
Answer Details
v = 2.5u

F =  u v u + v

0.2 =  u × 2.5 u u + 2.5 u

u = 0.28m

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