Resolution: Suppose your telescope has perfect mirrors and is limited only by diffraction. If you are viewing with light of 400 nm wavelength, what diameter mirror in a space telescope would have 1.0-km resolution of objects on Mars when viewed from above the earth at a time when the Earth-Mars distance of 80 million kilometers?
A. 39 km
B. 3.9 m
C. 3.9 km
D. 39 m
E. 390 m
Answer: D
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