An astronaut is looking down on earth\'s surface from a space shuttle at an altitude of `400 k
Channel: Doubtnut
Date: 19/01/2020

An astronaut is looking down on earth\'s surface from a space shuttle at an altitude of `400 km. ` Assuming that the astronaut\'s pupil diameter is `5 mm` and the wavelength of visible light is `500 nm. ` The astronaut will be able to resolve linear object of the size of about .