Physics
Photon-Electron Interaction
Quick fact
When a photon's energy exactly matches the gap between two electron energy levels, the electron can absorb the photon and jump to a higher level. If the energy doesn't match, the photon might just scatter or pass through.
Why this is interesting
You've seen a solar panel turn sunlight into electricity, but have you ever wondered what actually happens when a tiny particle of light meets an electron? It's a game of catch that can change the electron's entire world.