Halliday, Resnick & Walker — Diffraction: Problem 13

13 Estimate the linear separation of two objects on Mars that can just be resolved under ideal conditions by an observer on Earth (a) using the naked eye and (b) using the 200 in. (= 5.1 m) Mount Palomar telescope. Use the following data: distance to Mars $= 8.0 \times 10^7 \text{ km}$, diameter of pupil $= 5.0 \text{ mm}$, wavelength of light $= 550 \text{ nm}$.