Astronomers Are Proud of Their Telescopes and Often Say They

question 151

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 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 nm? (1 mi = 1.609 km)

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

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