An astronaut is looking down on Earth's surface from a space shuttle at an attitude of 400 km. Assuming that the assonants pupil diameter is 5 mm and wave length of visible light is 500 nm, the assonant will be able to resolve linear objects of the size of about

Question

$\begin{array}{1 1} 0.5\;m \\ 5\;m \\ 50\;m \\ 500\;m \end{array}$