A Telescope Has an Aperture of 20

question 3

Multiple Choice

A telescope has an aperture of 20.3 cm.How far apart must two blue stars (wavelength = 490 nm) be if they are 65 light years away (1 ly = 9.46 * 10¹⁵m) in order for the telescope to be able to resolve the two stars?

• A)1.81 * 10¹²m
• B)1.48 * 10¹²m
• C)2.79 * 10¹⁰m
• D)2.28 * 10¹⁰m

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