The resolution of the human eye is 2 ‘. What size objects can an astronaut distinguish on the surface of the Earth from

The resolution of the human eye is 2 ‘. What size objects can an astronaut distinguish on the surface of the Earth from a spacecraft flying at an altitude of 240 km?

r = Dq / 206 265
r = 240 * 120 / (2 * 10 ^ 5) = 0.144 km = 140 m.

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