(Problem 5.7 of Textbook): What size telescope (diameter of aperture) is required to resolve the components of a double star whose linear separation is 100 million km and whose distance from the earth is 10 light years? (Take 1 = 500 nm and one light year equals 9.5 trillion km). What is the minimum focal length of objective lens (fo) of the telescope so that human eyes can resolve the components of this double star using this telescope? (Assume that aperture diameter of human eye is 4mm and focal length of eyepiece is fe = 2cm).

(Problem 5.7 of Textbook): What size telescope (diameter of aperture) is required to resolve the components of a double star whose linear separation is 100 million km and whose distance from the earth is 10 light years? (Take 1 = 500 nm and one light year equals 9.5 trillion km). What is the minimum focal length of objective lens (fo) of the telescope so that human eyes can resolve the components of this double star using this telescope? (Assume that aperture diameter of human eye is 4mm and focal length of eyepiece is fe = 2cm).