Chemistry
Absorption Spectra
Quick fact
Every element has a unique absorption spectrum, acting like its 'fingerprint' in the universe.
Why this is interesting
Have you ever wondered why leaves appear green? It's all about how they absorb and reflect light—just like a fingerprint for molecules.
Read the full explanation
Understanding Absorption Spectra
Absorption spectra show which colors of light are absorbed by a substance. When light passes through a material, certain wavelengths are taken in by atoms or molecules. These wavelengths correspond to specific energy levels within the material, revealing its composition and structure.
A deeper explanation
Atoms absorb light when photons match the energy difference between their electron energy levels. This process leaves dark lines in the spectrum where light has been absorbed. By analyzing these patterns, scientists can determine what elements are present in a sample. Absorption spectra are crucial for understanding stars' composition and studying molecular interactions.