Subject: DOES PLASMA HAVE A FREQUENCY?

Things like lasers, for instance, and forms of electromagnetic radiation, have 
frequency ranges, such as UVA & UVB (208-400 nanometers).  Does plasma, or do 
different types of plasma have different frequencies?  For example, would a 
plasma created from helium have a different frequency from a hydrogen plasma 
(IF there is a frequency)?

Re: DOES PLASMA HAVE A FREQUENCY?