MCQ
The relation between the linear magnification m, the object distance u and the focal length f is
  • A
     $m =\frac{ f - u }{ f }$
  •  $m=\frac{f}{f-u}$
  • C
     $m =\frac{ f + u }{ f }$
  • D
     $m =\frac{ f }{ f + u }$

Answer

Correct option: B.
 $m=\frac{f}{f-u}$
 $m=\frac{f}{f-u}$

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