The Two Keck 10-M Telescopes, Separated by a Distance of 85

question 7

Multiple Choice

The two Keck 10-m telescopes, separated by a distance of 85 m, can operate as an optical interferometer. What is its resolution when it observes in the infrared at a wavelength of 2 microns?

• A) 0.01 arcsec
• B) 0.005 arcsec
• C) 0.4 arsec
• D) 0.06 arcsec
• E) 0.2 arcsec