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TS EAMCET 04 May 2019 Shift 1 Solved Paper

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Question : 104

Total: 160

The limit of resolution of a telescope is 2.5 × 10−7 radians. If the telescope is used to detect light of wavelength 500 nm coming from a star, the diameter of the objective lens used by the telescope is:

244 cm
258 cm
228 cm
264 cm

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