JEE Mains · Physics · STD 12 - 10. Wave optics
Diameter of the objective lens of a telescope is \(250\, cm\). For light of wavelength \(600\, nm\). Coming from a distant object, the limit of resolution of the telescope is close to
- A \(1.5 \times {10^{ - 7}}\,rad\)
- B \(2.0 \times {10^{ - 7}}\,rad\)
- C \(3.0 \times {10^{ - 7}}\,rad\)
- D \(4.5 \times {10^{ - 7}}\,rad\)
Answer & Solution
Correct Answer
(C) \(3.0 \times {10^{ - 7}}\,rad\)
Step-by-step Solution
Detailed explanation
Limit of resolution \(=\frac{1.22 \lambda}{\mathrm{d}}\) \(=\frac{1.22 \times 600 \times 10^{-9}}{250 \times 10^{-2}}\) \(=2.9 \times 10^{-7} \mathrm{rad}\)
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