MCQ
To increase the angular magnification of a simple microscope, one should increase:
- AThe focal length of the lens.
- ✓The power of the lens.
- CThe aperture of the lens.
- DThe object size.
✓
Answer
Correct option: B.
The power of the lens.
For a simple microscope in normal adjustment, the object is placed at a distance equal to $f ($the focal length$)$ from the lens, And the angular magnification is given by the relation
$\text{m}=\frac{\text{D}}{\text{f}}$
for $\text{u}<\text{f},\text{m}=\frac{\text{D}}{\text{f}}+1$
power of lens $=\frac{1}{\text{f}}$
Angular magnification depends on power.
$\text{m}=\frac{\text{D}}{\text{f}}$
for $\text{u}<\text{f},\text{m}=\frac{\text{D}}{\text{f}}+1$
power of lens $=\frac{1}{\text{f}}$
Angular magnification depends on power.
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