Homework Answers
do = object distance = 18 cm
di = image distance = ?
f = focal length = - 10 cm
using the lens equation
1/do + 1/di = 1/f
1/18 + 1/di = 1/(-10)
di = - 6.43 cm
so the image distance is 6.43 cm
magnifcation of the image is given as
m = - di/do
m = - (- 6.43)/18
m = 0.36
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