Physics
Emission Spectra and Atomic Energy Levels
Quick fact
Each element has a unique emission spectrum, like a fingerprint that identifies it.
Why this is interesting
Have you ever wondered why different elements glow in unique colors? It all starts with how atoms release light.
Read the full explanation
Understanding Emission Spectra and Atomic Energy Levels
When an atom absorbs energy, its electrons jump to higher energy levels. When they fall back down, they emit light at specific wavelengths—creating the emission spectrum. This is how we can identify elements based on their glowing colors in stars or gas lamps.
A deeper explanation
Atoms have discrete energy levels that electrons occupy. When an electron transitions from a higher to a lower energy level, it releases a photon with energy equal to the difference between those levels. The specific wavelengths of light emitted form the emission spectrum, which is unique for each element and reveals its atomic structure.