Question

You are looking down at the earth from inside a jetliner flying at an altitude of 9500 m. The pupil of your eye has a diameter of 2.00 mm. Determine how far apart two cars must be on the ground if you are to have any hope of distinguishing between them with the following lighting.

(a) red light (wavelength = 665 nm in vacuum)

(b) violet light (wavelength = 405 nm in vacuum)

Answer 1