Radio waves, being electromagnetic radiation propagate in virtually a straight line. Reflection and refraction do occur but not to a significant abd reliable level. The effect I think Ralph is experiencing is penetration of the various buildings between radios. Radio waves to penetrate various types of material, buildings, etc., the things that absorb radio waves best are lead (obviously), rock and soil and any other heavy masses. Radios are discussed as being line of sight because in air there is virtually no deflection of the straight line path nor absorption of the signal. So If you can see it, you can talk to it. I've used radios to talk over 70 miles line of site, with very good two way radios without a repeater. Jed *************************************************************************** PaddleWise Paddling Mailing List - All postings copyright the author and not to be reproduced outside PaddleWise without author's permission Submissions: paddlewise_at_lists.intelenet.net Subscriptions: paddlewise-request_at_lists.intelenet.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Thu Feb 03 2000 - 11:08:47 PST
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