The two stars are around 2.6 x 1011 m apart and are uniformly distant from the earth. A telescope consists of an objective lens having a diameter of 1.98 m and just detects these stars as separate objects. Suppose that light of wavelength 500 nm is being viewed. As well, suppose that diffraction effects, instead of atmospheric turbulence, limit the resolving power of the telescope. Determine the maximum distance which such stars could be from the earth.