Subj : Re: Morse Code
To   : Richard Brumbaugh
From : Tom Walker
Date : Tue Sep 05 2000 12:09 am

 RB> If you have a good STRONG light source, one that reaches the receiving
 RB> location you can talk over a light source with voice.  That was
 RB> demonstrated to my science class in the 30's. Of course, that can not
 RB> be done if the light is very far away, or weak.

The modern equilivent of that uses Lasers. And it increased the range  quite a 
bit
But becasue of safety factors the power should be limited.


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