Electromagnetic radiation
Videos
In physics, electromagnetic radiation or an electromagnetic wave is a self-propagating wave of the electromagnetic field that carries momentum and radiant energy through space. It encompasses a broad
James Clerk Maxwell (1831–1879)
Aurora Space Shuttle EO
Emission spectrum
Videos
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making a transition from a high energy state to a
A demonstration of the 589 nm D2 (left) and 590 nm D1 (right) emission sodium D lines using a wick with salt water in a flame