[time-nuts] time-nuts Digest, Vol 108, Issue 55

[Max Robinson]

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: max at maxsmusicplace.com

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----- Original Message ----- 
From: "Tom Holmes" <tholmes at woh.rr.com>
To: "'Discussion of precise time and frequency measurement'" 
<time-nuts at 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-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of Dan Kemppainen
>> Sent: Wednesday, July 10, 2013 1:11 PM
>> To: time-nuts at febo.com
>> Subject: Re: [time-nuts] time-nuts Digest, Vol 108, Issue 55
>>
>>
>>
>> On 7/10/2013 11:35 AM, time-nuts-request at 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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