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The aperture of the objective is 24.4 cm. The resolving power of this telescope, if a light of wavelength 2440 Å is used to see the object will be:

1. 8.1 × 10 6
2. 10.0 × 10 7
3. 8.2 × 10 5
4. 1.0 × 10 –8

Correct answer: 8.2 × 10 5

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