Why do things look darker with sunglasses?

Answer: Lenses block some light wavelengths

Lenses block some light wavelengths ✓ — Correct! Sunglasses use tinted lenses that absorb certain wavelengths or reduce light intensity overall. Less light passes through to your eyes, so objects appear darker. Polarized sunglasses also block horizontally-polarized light (glare). UV protection filters block ultraviolet rays. The darkness level depends on lens tint/density!

Eyes adjust to less light — Wrong. Eyes do adapt, but objects look darker primarily because sunglasses physically block/absorb light, reducing intensity reaching your retina.

Polarization removes brightness — Wrong. Polarization reduces glare (horizontally-polarized light), but overall darkness comes from tinted lenses absorbing/blocking light wavelengths.