A Binary Star System in the Constellation Orion Has an Angular

question 37

Multiple Choice

A binary star system in the constellation Orion has an angular separation between the stars of 4×10−⁵ radians.Assuming a wavelength of 500 nm,what is the smallest aperture (diameter) telescope that will just resolve the two stars? (1 nm = 10−⁹ m)

• A)1.2 cm
• B)1.5 mm
• C)1.5 cm
• D)4.8 cm
• E)​20 mm