- #1
jpartdq
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Homework Statement
A lens has a focal length of f=20cm. If an object is at o=50 cm, where is the image?
Homework Equations
1/f = 1/o + 1/i
The Attempt at a Solution
1/20 = 1/50 + 1/i
5/100 = 2/100 + 1/i
3/100 = 1/i
i = 100/3
I'm not sure how the answer could be 1/20 = 1/50 + 1/(100/3)? What am I doing wrong?