Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Physics

Polarization and the Electromagnetic Wave

Quick fact

Only transverse electromagnetic waves can be polarized, meaning their oscillations are confined to a single plane.

Why this is interesting

Have you ever noticed that sunglasses reduce glare by filtering light in a specific way? This is due to the polarization of light waves.