Astronomers Are Proud of Their Telescopes and Often Say They $\text { 102-cm-diameter }$

Multiple Choice

Astronomers are proud of their telescopes and often say they can "resolve a dime at so many miles." How many miles from a $\text { 102-cm-diameter }$ telescope mirror can you place a coin of diameter 3.0 cm and just resolve the coin using light of wavelength $389 \mathrm {~nm} ?$ (1 mi = 1.609 km)

A) 19 mi
B) 9.7 mi
C) 40 mi
D) 190,000,000 mi