Question

Domestic cats have vertical pupils. Imagine a cat is observing two small birds sitting side-by-side on a telephone wire. If the slit width of the cat's pupils is a = 0.510 mm and the average wavelength of the ambient light is λ = 621 nm, what is the angular resolution (in rad) for the two birds?

What is the approximate size of the smallest object on the Earth that astronauts can resolve by eye when they are orbiting 250 km above the Earth? Assume ___________m

Answer 1