MCQ
Magnification of an optical instrument is expressed in:
- A$m$
- B$m^{-1}$
- C$D$
- ✓It has no unit
✓
Answer
Correct option: D.
It has no unit
$\text{Magnification}=\frac{\text{Image Height}}{\text{Object Height}} $
because unit of image height and object height is same hence unit of magnification is none because it is a constant number. So, it has got to unit.
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