I think that luminous dial watches still contain a little tritium to keep
them glowing for many hours after the atoms that were excited by visible
photons have all decayed. Without the tritium the glow would completely go
dark after most of the atoms have decayed to their ground state.
Regards.
Max. K 4 O DS.
Email: m...@maxsmusicplace.com
Transistor site http://www.funwithtransistors.net
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http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html
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----- Original Message -----
From: "Tom Holmes" <thol...@woh.rr.com>
To: "'Discussion of precise time and frequency measurement'"
<time-nuts@febo.com>
Sent: Wednesday, July 10, 2013 1:05 PM
Subject: Re: [time-nuts] time-nuts Digest, Vol 108, Issue 55
My last two wrist watches (I know, that makes me an anachronism on this
list) both have hands that glow in the dark, but I assume it is the result
of absorbing photons for later release, not some radioactive source.
Am I wrong?
Tom Holmes, N8ZM
Tipp City, OH
EM79
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Dan Kemppainen
Sent: Wednesday, July 10, 2013 1:11 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] time-nuts Digest, Vol 108, Issue 55
On 7/10/2013 11:35 AM, time-nuts-requ...@febo.com wrote:
> Public perceptions of risk change with time.
>
> In WWII, Radium dial watches, aircraft instruments, dial and switch
> markings, were ubiquitous. But so were explosives, bombs, bayonettes,
> and a bunch of other things. So people didn't have the luxury of
> concerns over minor things.
>
> Now that is not so.
>
> -John
Not to fan the fire. But you can still buy tritium glow in the dark
sights
for pistols (It
is standard on a lot of them now). You can even add tritium glow in the
dark tubes
to custom flashlights and I think even knives... :)
Dan
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