Path: utzoo!attcan!uunet!snorkelwacker!tut.cis.ohio-state.edu!rutgers!att!cbnewsl!moss!feg
From: feg@moss.ATT.COM (Forrest Gehrke,2C-119,7239,ATTBL)
Newsgroups: comp.sys.ibm.pc
Subject: Re: GAS PLASMA SCREENS!!
Summary: f
Message-ID: <5096@cbnewsl.ATT.COM>
Date: 12 Apr 90 15:14:40 GMT
References: <1990Apr10.002440.9812@ux1.cso.uiuc.edu> <1074@lectroid.sw.stratus.com>
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Organization: AT&T Bell Laboratories
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In article <1074@lectroid.sw.stratus.com>, dts@pwllheli.sw.stratus.com (Daniel Senie) writes:
> In article <26226d66.1467@petunia.CalPoly.EDU>,
> jdudeck@polyslo.CalPoly.EDU (John R. Dudeck) writes:
> 
> |>CRT's DO NOT emit any radiation other than visible light!
> 
> Explain this: Take the handset off of a standard telephone (Bell 2500
> saeries, for example) and unplug it from the phone. Hold the handset
> near your CRT and put your ear to the receiver. Where do you suppose the
> buzzing noise you hear is coming from?
> 

Before we get too far down this path, let's be certain everyone
knows the difference between electromagnetic radiation (radio,
for instance), and ionizing radiation (xrays, for instance).
What you are hearing in your telephone is the detection of the
scanning circuits electromagnetic radiation.  If you place a
radio receiver near your PC you will hear all sorts of radio
radiation produced by the various circuits in the PC.  None
of this is produced by the CRT.  This radio emission is the
same you will hear if you place a receiver near a TV set.
The latter is producing a good deal more than a PC, BTW.

Forrest Gehrke feg@dodger.ATT.COM