At 01:24 AM 3/7/98 +1000, you wrote:
>>Just to throw in another possibility, there is a small window in the IR
>>spectrum that will transmit well through water.  But please note that VLF
>>is the best way to go in water.  The scroedinger wave equation can show
>>that any EM wave's propagation is a function of medium density and wave
>>frequency.
>>
>>                                                        - Dennis
>Hi Dennis,
>
>I think you are confusing density with the electromagnetic
>properties of the material. And further confusing propagation
>velocity with absorbtion.
>
>The electromagnetic properties of the material determine the
>absorbtion (attenuation).

Yep, you're right.  I probably shouldn't try to quote things from books
that have more than an inch of dust on them.... thanks for the
clarification! :)