The oscillators being examined could either be free waves in space or some normal mode contained in some cavity.
2.
Free waves are those that are travelling through the atmosphere, or through empty space; they are not connected with charged particles or currents.
3.
Since January 1, 2011, the registrant for this broadcasting operational company has been updated under the name of " Tenjin FM K . K . ", which used to run a community FM station called " FREE WAVE ".
4.
In a stratified ocean of mean depth " H ", free waves propagate along coastal boundaries ( and hence become trapped in the vicinity of the coast itself ) in the form of internal Kelvin waves on a scale of about 30 km.
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