Frank Coluccio Technology Forum - ASAP Message Board

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Technology Stocks : Frank Coluccio Technology Forum - ASAP

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To: Raymond Duray who wrote (234)	11/4/1999 4:26:00 AM
From: elmatador	of 1782

Just a few points of on communications by waves: Radio waves behave like light -which is a radio wave you can see- they bounce, reflect, difracts etc. The higher the frequency the more the wave travels in a straight line which follows that the less this signal spreads. The higher the frequency the smaller the wave length. A reason why XRay passes through you body tissue since the wave lenght is very small. The lower the frequency the more it spreads. A reason why you can listen to Botswana Radio in short wave. But you need bigger antenna to catch those long wave lenghts. The higher the frequency, the more it attenuates -loses its power- as it travels to the medium. Submarimnes coimmunicates with very low frequencies since they have to cut through the medium water. The spectrum is divided in pieces called bands. FM radio is a band, just above it you have the VHF TV band, all the way up to cosmic rays. Governemnts -being who they are always out to collect your and mine money- divided radio spectrum in bands to sell licenses to use this spectrum.

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