- #1
Saxby
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Homework Statement
When an object is closer to a concave mirror than the mirror's focal point the...
(a) Magnification is more than 1
(b) Magnification is less than 1
Homework Equations
M = -Si/S
1 / f = (1 / S) + (1 / Si)
M = Magnification
S = Distance between object and mirror
Si = Distance between image and mirror
f = Distance between focal point and mirror
The Attempt at a Solution
I an attempt to solve this problem i simply plugged in values where S<f, in this case i'll use S=1 and f=2.
Plugging these values into the second equation i receive: 1/2 = (1/1) + (1/Si). From this equation i get Si=-2, and then plugging S=1 and Si=-2 into the second equation i get: M = -(-2/1) which is M = 2.
If M=2 this leads me to believe that the answer to this question is (a), but according to the answers provided it should be (b). I really can't figure out where I've made a mistake. Any help would be much appreciated :)
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