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

ufu−f

B

u+fu−f

C

ff−u

D

f+uu−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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