Physics
Absorption Spectroscopy
Quick fact
Absorption spectroscopy can identify elements in stars millions of light-years away by analyzing the unique absorption patterns of their light.
Why this is interesting
Have you ever wondered why leaves appear green or why certain materials change color under light? It all starts with how they absorb and reflect different wavelengths of light.
Read the full explanation
Understanding Absorption Spectroscopy
When light passes through a material, some wavelengths are absorbed while others pass through. The pattern of absorption depends on the structure and composition of the material, allowing scientists to determine its identity without touching it.
A deeper explanation
Absorption spectroscopy works by shining light through or reflecting it off a sample and measuring which wavelengths are absorbed. Atoms and molecules absorb specific wavelengths because their electrons transition between energy levels. This absorption pattern acts like a fingerprint for the material, revealing its chemical makeup and properties.