From: John Woodgate
Subject: Re: Any ideas on measuring radiation in the home ?
Date: Tue, 8 Oct 2002 16:56:13 +0100
Organization: JMWA Electronics Consultancy
Reply-To: John Woodgate
NNTP-Posting-Date: Tue, 8 Oct 2002 17:47:21 +0000 (UTC)
X-Newsreader: Turnpike (32) Version 4.01 <5Z8C9wtxbnpWyFnyfFzqmVF739>
I read in sci.electronics.design that Dirk Bruere
wrote (in ) about 'Any ideas on
measuring radiation in the home ?', on Tue, 8 Oct 2002:
>"Mike Poulton" wrote in message
>> On 08 Oct 2002, "Dirk Bruere" said:
>> > "John Woodgate" wrote in message
>> >> A good bit less than you'd get outdoors in a thunderstorm. We
>> >> *evolved* with exposure to thunderstorms.
>> > But not AC thunderstorms.
>> Last time I checked, lighting strikes were just about the most powerful
>> radio transmission devices on the planet. The static field is DC, but
>> the field produced by a strike definitely is NOT.
>For a tiny fraction of a second, and then only if one is close.
>There is no natural source of high intensity chronic AC fields.
Lightning flash emissions go all round the globe, some more than once.
The high field region (over 1 V/m) is quite large, although I can't turn
up the figures at present. IIRC, we are talking kilometres. And although
the disturbance from one flash is over in a few tens of milliseconds,
flashes can be almost continuous in tropical storms.
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk
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