An object is placed 20 cm from a diverging lens. If the distance between the lens and the image is 8 cm, what is the magnification ?

– by 0

A. 1/2
B. 5/2
C. 1/15
D. 2/5

the magnification factor, m, is equal to i/o
“I” is the image distance from the lens 
“o” is the object distance.
we have m=i/o
(8cm) / (20cm)
= 2/5.

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