What,approximately,are the Dimensions of the Smallest Object on Earth That $\lambda$

question 3

Multiple Choice

What,approximately,are the dimensions of the smallest object on Earth that the astronauts can resolve by eye at 200 km height from the space shuttle? Assume $\lambda$ = 500 nm light and a pupil diameter D = 0.50 cm.Assume eye fluid has an average n = 1.33.

• A)150 m
• B)100 m
• C)250 m
• D)25 m
• E)18 m