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Boxter
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Homework Statement
A concave mirror of focal length 20cm forms an image which is three times the height of the object. Find the distance of the object from the mirror if: 1: The image is real
2: The image is virtual
Homework Equations
1/u + 1/v = 1/f
m = v/u
The Attempt at a Solution
f = 20cm
u = ?
v = ?