A real image of an object fom1ed by a convergin... - WAEC Physics 1992 Question
A real image of an object fom1ed by a converging lens of focal length 15cm is three times the size of the object. What is the distance of the object from the lens?
A
30cm
B
25cm
C
20cm
D
15cm
correct option: c
1/u + 1/3u = 1/15; u = 20cm
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