## frequency, $$\nu$$, $$\omega$$

in photochemistry
https://doi.org/10.1351/goldbook.FT07383
The number of waveperiods per time interval. The linear frequency, $$\nu$$, is the number of cycles per time interval. SI unit $$\text{Hz = s}^{-1}$$.
Note:
For the @A00352@ the symbol $$\omega$$ ($$= 2\pi\nu$$) is used with $$\text{rad s}^{-1}$$ as the SI unit.