You are looking down at the earth from inside a jetliner flying at an altitude of 9700 m. The pupil of your eye has a diameter of 2.00 mm. Decide how far apart two cars should be on the ground if you are to have any hope of distinguishing among them with the following lighting.
a) Red light (wavelength = 665 nm in vacuum)
b) Violet light (wavelength = 405 nm in vacuum)