Physics
Photon Emission and Absorption
Quick fact
Atoms emit or absorb photons only when their electrons transition between energy levels, making light an atomic 'language'.
Why this is interesting
Have you ever wondered why objects glow when heated or how your phone uses sunlight to charge? It all starts with the invisible dance of photons and atoms.
Read the full explanation
Understanding Photon Emission and Absorption
When an atom absorbs a photon, its electron jumps to a higher energy level. When it releases a photon, the electron drops back down. This exchange is like a tiny ballerina leaping up and coming back down, powered by light.
A deeper explanation
Photon emission and absorption occur due to changes in an atom's energy levels. Electrons absorb photons when their energy matches the difference between two levels, causing them to jump higher. When they return to lower levels, they release photons. These processes are fundamental to understanding how atoms interact with light and underpin technologies like lasers and solar cells.