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An astronaut is looking down on earth's ...

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 5mn and the wavelength of visible light is 500 nm, the astronaut will be able to resolve linear objects of the size about

A

0.5 m

B

5 m

C

50 m

D

500m

Text Solution

Verified by Experts

Angular limit of resolution `x/l=1.22 lamda/a therefore x=(1.22 times 500 times 10^-9 times 400 times 10^3)/(5 times 10^-3)=50m`
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