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

Answer

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

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