Question

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

Answer 1

Solution :
dθ=xd
=1.22λD
x=1.22λdD
=1.22×(500×10−9)(400×103)5×10−3
=48.8m
its nearly 50 m
Answer : 50 m