[time-nuts] Thinking outside the box a super reference

bownes bownes at gmail.com
Fri Nov 4 21:40:45 EDT 2016


Not to mention there is not so sensitive film, sensitive film and really sensitive film. 

Good old orthographic film took minutes in bright light. 



> On Nov 4, 2016, at 20:24, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> In message <c57q1c5engv94amimot7pu3l8romu6g2p0 at 4ax.com>, David writes:
> 
>> Various online sources say that natural rubidium is radioactive enough
>> to fog photographic film in 1 to 2 months but that is also the case
>> with unprocessed uranium ore so I would not worry about it at all.
> 
> Yes, that sounds about right for an isotope with a 40 billion years
> half-life.
> 
> 1 to 2 months is a LOOOONG time for photographic film.
> 
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by incompetence.
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