Why do clouds appear white?

Answer: Droplets scatter all wavelengths

Ice crystals reflect white light — Wrong. Ice crystals do scatter light, but clouds appear white because droplets/crystals scatter all wavelengths equally, not selectively.

Sky light colors the clouds — Wrong. Clouds aren't colored by sky. They appear white because water droplets scatter all visible light wavelengths equally through Mie scattering.

Droplets scatter all wavelengths ✓ — Correct! Clouds contain millions of water droplets (~10-20 microns)—similar size to light wavelengths. This causes Mie scattering, scattering all visible wavelengths equally. All colors combined = white! Gray/dark clouds are thick—light is absorbed or scattered away before reaching you. Rayleigh scattering (tiny molecules) makes sky blue, Mie scattering (droplets) makes clouds white!