Re: X-Rays

["Charles Andrew" <candrewpsu@xxxxxxxxxxxxx>]

I just read your piece on X-Rays and it brought to mind something else.
Last week,
there were again reports on the problem of long exposure to EMF by powerline
workers.
It is easy to think of all the reasons why this might be a problem.  Then, I
got a constant
voltage transformer with a 60 cycle hum for my computer (the hum was free)
and it kept
me up all night...I couldn't relax.  So, I obviously moved it out to where I
could not hear
it.  If the body does not get enough sleep or is tense then the genetic
repairs maybe aren't
done. So, I would think about noise cancelling headphones for the pilots and
perhaps
the lead underwear, as well when there is long-term exposure.  I would
wonder if radiation
was a selective force early in our evolution and that is why we work to
repair the damage.
Chuck
----- Original Message -----
From: Andy Finney <andy@xxxxxxxxxxxxxxxx>
To: <infrared@xxxxx>
Sent: Sunday, March 26, 2000 8:04 AM
Subject: X-Rays


> Willem-Jan wrote:
>
> "Natural/background radiation at such high altitudes is probably a
> magnitude larger than X-ray fogging...."
>
> I hope you're wrong about that. The air crew would be wearing lead
> underwear ... or perhaps you only fly Concorde WJ :-) I have a friend
> with connections to the NRPB (National Radiological Protection Board)
> and next time I see him I'll ask him. This could also make it risky
> to take film into areas with lots of granite, like Cornwall, which
> are famous for higher levels of background radiation.
>
> I did once pass my DV camcorder through an x-ray scanner (at the
> European Parliament rather than an airport) while it was recording
> and there was a distinct short burst of static on sound and vision,
> of a few lines duration (and so of the order of 100-200
> microseconds), as the camera was scanned (I assume). You get a
> similar effect if your camera is hit by a beam of RADAR. In the case
> of the RADAR, the frequency of the pulses in the beam is within the
> reception range of a UHF television which is lower than x-rays of
> course. The video from the Falklands war was full of such RADAR
> bursts, showing especially well in night shots.
>
> ... and the 'lost tribe' X-ray incident happened over 15 years ago
> and was reported to production staff as a warning against
> unintelligent x-ray machines at remote airports. (I'm not sure
> whether the Invision machines were around then.) Perhaps you're
> referring to another incident: there have been plenty of them.
>
> On the other hand ... where would urban myths be without things like
> discussion groups on the Internet.  BBC Radio Producers used to be
> allowed to take taxis rather than use the underground because it was
> alleged that the high magnetic fields from the motors could erase
> tapes. Eventually I discovered that the risk was only there if you
> put the tape on the floor over a motor, which usually meant one of
> the four motor cars in a normal tube train.
>
> Cheers
>
> Andy
> Invisible Light (http://www.atsf.co.uk/ilight/)
> *
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