Light, Photon Energies and Atomic Spectra
Light Has a Dualistic Nature, being sometimes particle like and sometimes wave like.
- The wave properties are consistent with a electric field whose wavelength(? (in meters)), usually measured (for light in nanometers (10-9m))
- The speed of light c is about 3 x 108 meter/sec
- The frequency (?) is obtainable from the formula ??=c. The old unit of frequency was cycles/second which is now called hertz (Hz).
Visible light extends from about 400 nm to about 700 nm, following the ancient ROYGBIV acronym.