Arun-Kumar Tripathi (tripathi@amadeus.statistik.uni-dortmund.de)
Thu, 1 Apr 1999 05:15:58 +0200 (MET DST)
Date: Thu, 1 Apr 1999 05:15:58 +0200 (MET DST) From: Arun-Kumar Tripathi <tripathi@amadeus.statistik.uni-dortmund.de> Subject: Re: IFETS-DISCUSS Digest - 30 Mar 1999 to 31 Mar 1999
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On Wed, 31 Mar 1999 Sophist888@aol.com wrote:
>
> Vilnis Vulfs writes:
>
> << The configuration of computers in school labs has been an interest of mine.
> I have heard that most (90%) of the radiation emitted from monitors is
> emitted from the back. If this is true, a circular configuration might
> increase radiation exposure. Does anybody have any good research on the
> topic of radiation emission from computers?
>
> Vilnis Vulfs
> Senior Instructional Designer
> Kelly Services >>
>
> Vilnis,
>
> Cathode ray tubes (CRTs) work by shooting an electron beam from the back to
> the surface of the tube. Most emission is of the X-Ray variety and comes out
> the front. Manufacturers have known this for years and have taken many
> precautions in the design of CRTs to limit exposure. These include the
> incorporation of leaded glass into the back of the CRT's viewing surface. The
> emitted radiation is measured as a standard part of quality control and unsafe
> tubes are not used in production. As with television, the greatest danger of
> exposure to the miniscule amount of X-Ray radiation that does come through the
> front, will occur closer to the surface. So the best protection for computer
> users who generally sit close to the screen is an ergonomically designed work
> station that keeps them from being within a foot of the screen. Frequent
> breaks are also recommended.
>
> I don't have the documents in front of me, but these are general impressions I
> get after having seen numerous articles in "Information Display." Notebook and
> laptop computers using LCD display devices are pretty safe from a radiation
> point of view. Eye strain is a greater danger. Eye strain is probably a
> greater danger when using CRT displays as well.
Dear Howard,
Could you tell me, which screen "Computer screen" or "TV screen"
emits the discrete or Continuous rays?
>
> - Howard Solomon
> technical instructor
> Panasonic Services Co.
Regards
Arun
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