Standard Symbols
Symbol  Quantity  Units


l  wavelength  [m]
 n  frequency  [/s]
 w  angular frequency  [/s]
 k,s  wavenumber  [cm^{1}]
 p  momentum  [kg m /s]
 E  energy  [kg m /s²]
 h  Planck's const  [J s]


Basic Equations
Quantity  Related quantity


l  = c / n
 w  = 2 p n
 k  = 2 p /l
 p  = h / l
 E  = h n


Energy Conversion
Base Unit  Conversion factor


1[eV]  = e6 [MeV] = 1.602e12 [erg] = 3.829e20 [cal]
 ~ 1.783e33g ~ 11,605 K
 1[Cal]  = 4.184 [J]
 1[cm^{1}]  ~ 1.986e16 [erg]

