If the Angular Resolution of Detail on Astronomical Objects Is

If the angular resolution of detail on astronomical objects is limited to about 0.5 arcsec by seeing fluctuations in Earth's atmosphere, what is the smallest lunar crater that can be seen from Earth? (Hint: Use the small-angle formula in Chapter 1, Universe, 11th ed.)

A) about 100 m
B) about 3.8 km
C) about 250 m
D) about 1 km

Correct Answer:

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