https://doi.org/10.1351/goldbook.08242
Flow of energy through space propagated as synchronized sinusoidal waves of the electric field, \(\boldsymbol{E}\), and the magnetic field \(\boldsymbol{H}\).
Notes:
- Electromagnetic radiation is characterized by frequency \(\nu\), wavelength \(\lambda\), and speed \(c\), where \(\nu\lambda = c\).
- The wavelength and velocity change when radiation enters a medium. In its interaction with atoms and molecules, radiation behaves like particles, called photons, with zero mass, energy \(h\nu\), and momentum \(h/\lambda\), where \(h\) is the Planck constant \(h = \pu{6.62607015E-34 J s}\).