When Mars is nearest the Earth, the distance separating the two planets is 88.6 x 106 km.

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When Mars is nearest the Earth, the distance separating the two planets is 88.6 x 106 km. Mars is viewed through a telescope whose mirror has a diameter of 30.0 cm.
(a) If the wavelength of the light is 590 nm, what is the angular resolution of the telescope?
(b) What is the smallest distance that can be resolved between two points on Mars?
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