Water is conductive and thus can receive radiation. The electrons are
not totally bound to the molecule meaning water is a weak plasma. I am
interested in knowing what the plasma frequency is for water,
empirically or from calculations.
Plasma frequency=omega=(4*pi*n*e^2/me)^0.5

Hi, thank you for submitting your question to Answers.Google, I hope I
can provide the information you are seeking.

The plasma frequency of water (h-2-o) is Z(0), between 9 and 10 Hertz
(cycles per second.)

See pages 63 and 64 of 

?About Strange Effects Related to Rotating
Magnetic Systems?, M. PitkĻanen
Dept. of Physics, University of Helsinki, Helsinki, Finland.
Email: matpitka@rock.helsinki.fi.
http://www.physics.helsinki.fi/?matpitka/.

http://www.physics.helsinki.fi/~matpitka/faraday.pdf

and

?Hutchison effect and classical Z0 force?
Matti PitkĻanen
Kadermonkatu 16, 10900, Hanko, Finland
E-mail matpitka@rock.helsinki.fi
March 8, 2004

Search term for scholar.google.com: plasma frequency of water

http://scholar.google.com/scholar?q=%22plasma+frequency+of+water%22&ie=UTF-8&oe=UTF-8&hl=en&btnG=Search


Definition of empirical, google search term: define:empirical

based on experience or observational information and not necessarily
on proven scientific data. In the past, vaccine trials have been
performed based exclusively on empirical data and without a full
understanding of the disease processes or correlates of immunity.
www.niaid.nih.gov/factsheets/GLOSSARY.htm

Thank you again for turning to Answers.Google for help. If I
understood your question as intended, I believe 10 Hz. is the
empirical answer you were requesting.