What angular resolution is possible with the Keck telescopes when light from both telescopes is combined? (Assume observations are made in visible light at 500 nm wavelength.)
A) 1/20,000 arcsec
B) 1/200 arcsec
C) 1/2000 arcsec
D) 1/5 arcsec (limited by atmospheric turbulence, or "seeing")
Correct Answer:
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