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 m is equal to (symbols have their ususal meanings)
ufu−f
u+fu−f
ff−u
f+uu−f
A
u+fu−f
B
ff−u
C
f+uu−f
D
ufu−f
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Solution
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m=h1h0=−vu......(i) From mirror formula 1f=1v+1u........(ii) Multiplying equation (ii) by u, we get uf=uv+1 or uv=uf−1=u−ff or vu or m=−vu=−fu−f=ff−u
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