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1. |
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 × 10-7 rad |
B. | 2.0 × 10-7rad |
C. | 3.0 × 10-7 rad |
D. | 4.5 × 10-7 rad |
Answer» D. 4.5 × 10-7 rad | |