The linear magnification for a mirror is the ratio of the size of the image to the size of the object, and is denoted by m. Then we may write: (symbols have their usual meanings)
f=1+mmu
f=mu
None of these
f=mu1+m
A
f=mu1+m
B
None of these
C
f=1+mmu
D
f=mu
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Solution
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Mirror equation: 1f=1v+1u
Multiplying both sides by u, we get:
uf=uv+uu
or, uv=uf−1=u−ff
or, vu=fu−f
or, m=fu−f
or, mu=f+mf
or, f=mu1+m
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