MCQ
Resolving power of a telescope increases with:
- AIncrease in focal length of eyepiece
- BIncrease in focal length of objective
- CIncrease in aperture of eyepiece
- ✓Increase in aperture of objective
✓
Answer
Correct option: D.
Increase in aperture of objective
Resolving power of a telescope:
$\text{R}=\frac{\text{a}}{1.22\lambda}$
where, a is diameter of the objective
so, $R$ increases when a is increased and a increases when aperture of objective is increased.
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