Physics
Photon Absorption and Emission
Quick fact
A single photon can be absorbed by an atom, causing it to emit another photon in a process that powers everything from stars to your phone screen.
Why this is interesting
Have you ever wondered why objects glow when heated or how solar panels work? It all starts with photons and their interaction with atoms.
Read the full explanation
Understanding Photon Absorption and Emission
When light hits an atom, its energy can be absorbed by an electron, lifting it to a higher energy level. Later, the electron drops back down, releasing the stored energy as a photon. This exchange of photons is how atoms interact with light and form the basis of many natural processes.
A deeper explanation
Photon absorption occurs when an atom absorbs a photon's energy, exciting an electron to a higher energy state. Emission happens when that electron returns to its original state, releasing the stored energy as another photon. This quantum process is essential for understanding phenomena like fluorescence, thermal radiation, and how light is used in modern technologies.