 |
The introduction to this article provides insufficient context for those unfamiliar with the subject. Please help improve the article with a good introductory style. |
A Fresnel is a unit of frequency equal to 1012 sec-1. It was occasionally used in the field of spectroscopy, but its use has been superseded by terahertz (1012 hertz).[1]
References
- ^ Bayliss, Noel S. "The permicron: a unit of wavenumber", Nature, vol. 167, p. 367, 3 March 1951.
