Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!srhqla!demott!kdq From: kdq@demott.COM (Kevin D. Quitt) Newsgroups: comp.sys.ibm.pc Subject: Re: GAS PLASMA SCREENS!! Message-ID: <140@demott.COM> Date: 11 Apr 90 22:45:40 GMT References: <26226d66.1467@petunia.CalPoly.EDU> Reply-To: kdq@demott.COM (Kevin D. Quitt) Distribution: na Organization: DeMott Electronics Co., Van Nuys CA Lines: 35 In article <26226d66.1467@petunia.CalPoly.EDU> jdudeck@polyslo.CalPoly.EDU (John R. Dudeck) writes: > >In article <1990Apr10.002440.9812@ux1.cso.uiuc.edu> gcw20877@uxa.cso.uiuc.edu (George Wang) writes: >>I am just curious whether GAS PLASMA SCREENS (such as the one found >>in Toshiba laptops) emit some form of radiation like those found >>in CRT screens... > >CRT's DO NOT emit any radiation other than visible light! You're making a joke, right? Besides the RF they produce at both horizontal and vertical scanning frequencies (plus harmonics, plus hetrodynes), and besides the electrons that get through the phosphor, color CRTs give off xrays, mostly in the direction of the user. Commercial Xray machines have a beam of electrons slam into a metal target to generate the radiation. In a color CRT, one or more beams of electrons slam into the shadow mask to prevent any but the center group to pass to the phosphor - the results are the same. The only question is how much radiation comes out, and that varies depending upon the type of glass used on the face of the tube, but mostly on the voltage applied between the cathode and anode on the tube itself. kdq -- _ Kevin D. Quitt Manager, Software Development DeMott Electronics Co. VOICE (818) 988-4975 14707 Keswick St. FAX (818) 997-1190 Van Nuys, CA 91405-1266 MODEM (818) 997-4496 Telebit PEP last 34 12 N 118 27 W srhqla!demott!kdq kdq@demott.com "Next time, Jack, write a God-damned memo!" - Jack Ryan - Hunt for Red October