Fresnel (unit)

The Fresnel ( unit symbol : fresnel) was a frequency unit proposed by France in 1969 but not accepted internationally , named after the French physicist Augustin Jean Fresnel .

1 fresnel = 10 ¹² Hertz (Hz) = 1 Terahertz (THz)

source

Peter Kurzweil: The Vieweg unit lexicon. Vieweg, Braunschweig / Wiesbaden 2000, ISBN 978-3528069872 .