The diameter of the objective of a telescope is $3.6 \ m$. The limit of resolution of the telescope for a light of wavelength $540 \ nm$ is
- A$1.22 \times 10^{-7} \ rad$
- B$1.83 \times 10^{-7} \ rad$
- C$0.61 \times 10^{-7} \ rad$
- D$3.76 \times 10^{-7} \ rad$
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To increase both the resolving power and magnifying power of a telescope:
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