Tag
#spectroscopy
2 articles
Earth & Climate
The Greenhouse Effect
Sunlight comes in as visible light and leaves as infrared, and a handful of molecules are transparent to one and opaque to the other. That asymmetry sets the temperature of the planet.
11 minJul 20, 2026
Chemistry
Spectroscopy: Reading Matter with Light
Atoms absorb and emit light only at wavelengths set by their electron energy levels, so light carries a fingerprint of composition — the basis of knowing what stars, galaxies, and unknown compounds are made of, remotely.
10 minJul 4, 2026