Physics
Emission Spectrum
Quick fact
The unique pattern of lines in an emission spectrum can reveal exactly which elements are present in a glowing gas.
Why this is interesting
Have you ever wondered how scientists determine the composition of distant stars? They use a tool called an emission spectrum to unlock this mystery.
Read the full explanation
Understanding Emission Spectrum
When atoms are heated or excited, they emit light at specific wavelengths. These emitted wavelengths form a pattern of bright lines called an emission spectrum. Each element has its own unique set of lines, like a fingerprint, allowing scientists to identify the substance.
A deeper explanation
An emission spectrum arises when electrons in atoms transition from higher energy levels to lower ones, releasing photons with energies corresponding to those differences. The specific wavelengths emitted depend on the electron transitions within each atom, making emission spectra unique to elements and useful for spectroscopy.