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

Question

Dr. Abubacker · Accepted Answer

(c) $\frac{x}{r} = \frac{1.22\ \lambda}{d} \Rightarrow x = \frac{1.22\ \lambda r}{d}$
$= \frac{1.22 	imes 500 	imes 10^{- 9} 	imes 400 	imes 10^{3}}{5 	imes 10^{- 3}} = 50\ m$

Q. 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

Explanation

Reviewed by Dr. Abubacker

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