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

Wave Frequency and Energy Relationship

Quick fact

The higher the frequency of a wave, the greater its energy. This is why X-rays are dangerous while radio waves are safe.

Why this is interesting

Have you ever wondered why sunlight can both warm your skin and cause sunburn? It’s all about the energy in light waves—higher frequency means more power.