It raises an interesting question given that it is well known that airline pilots and cabin crew are subject to a lot of radiation given their time at altitude, I wonder just how much more film is fogged whilst flying around in aircraft compared to on the ground. Much of that stuff described above is ISTR upper atmosphere, its part of the reason why life on our planet has taken hold thanks to the protection we get from our thin layer of atmosphere.
not cosmic rays but actually muons cause film fog
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NJH, you present a good question!
For the average film user its hard to tell how much more film is fogged as far as aircraft vs ground, that is unless they are pilots, film shooters and scientifically curious.
Some airport scanners are cranked up, others not so. As mentioned in the ISO doc, there are earth stones and elements capable of fogging film, then you have solar maximum and solar minimum cycles, so generally things are hardly consistent in order to be measured with repeatable result.
For the average film user its hard to tell how much more film is fogged as far as aircraft vs ground, that is unless they are pilots, film shooters and scientifically curious.
Some airport scanners are cranked up, others not so. As mentioned in the ISO doc, there are earth stones and elements capable of fogging film, then you have solar maximum and solar minimum cycles, so generally things are hardly consistent in order to be measured with repeatable result.
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John, the muons are part of the cosmic radiation.
The Technical Committee ISO/TC 42, responsible for the International Standard ISO 18928 don't differentiate muons from the cosmic radiation.
This graphic might help you out.
many thanks georg
i had a feeling "cosmic rays" was a blanket term
being used for everything including muons ..
You forgot tachyons!
I just took 2 rolls of 120 from Michigan to Chile and back, unused.
-(1) Ektar 100 and (1) Portra 160.
They went through 6 scans in my carry-on and about 25 hours at altitude.
Is it worth while to process one of these along with one from same batch that stayed in fridge?
That will cost 2 rolls. (I process and scan C41 here)
But such a test may help dispel the endless speculation we have on the subject.
Another thought is to purchase 2 rolls of higher iso, say 800 and do it next on the next trip.
??
-(1) Ektar 100 and (1) Portra 160.
They went through 6 scans in my carry-on and about 25 hours at altitude.
Is it worth while to process one of these along with one from same batch that stayed in fridge?
That will cost 2 rolls. (I process and scan C41 here)
But such a test may help dispel the endless speculation we have on the subject.
Another thought is to purchase 2 rolls of higher iso, say 800 and do it next on the next trip.
??
Even in the literature, sometimes "cosmic rays" is used as general term including the muons they create, and sometimes the term means only the high energy particles that interact with the top of our atmosphere to create muons. A Faraday cage would do nothing to stop them, and they can be detected pretty far underground. Not like neutrinos ( that basically go through the earth like it isn't here! ) but difficult to stop even with lead. These are not x-rays, like used at the airport.
Early experiments were done by sending film ( usually layers of film like pages in a book ) up in high altitude balloons. I'm sure if you took a bulk roll of film on an airplane, and examined it very carefully, you'd be able to find microscopic pinholes that would line up in the film layers. And you'd find more of them than if you left a the bulk roll at sea level.
Early experiments were done by sending film ( usually layers of film like pages in a book ) up in high altitude balloons. I'm sure if you took a bulk roll of film on an airplane, and examined it very carefully, you'd be able to find microscopic pinholes that would line up in the film layers. And you'd find more of them than if you left a the bulk roll at sea level.
PE, aren't tachyons used in the formulations speed- enhancing developers ?
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Well, 50/50.
US, Chile?
You never know who's really into it solar radiation management, how much, and how far the mojo is cooked.
Thus far (2014), the worldwide scientific collaboration includes 70 countries.
it's so convoluted that anyone can have a theory, but no one's got the facts, at least mere mortals.
US, Chile?
You never know who's really into it solar radiation management, how much, and how far the mojo is cooked.
Thus far (2014), the worldwide scientific collaboration includes 70 countries.
it's so convoluted that anyone can have a theory, but no one's got the facts, at least mere mortals.
David A. Goldfarb
Moderator
The cat's out of the bag. Cartier-Bresson, Adams, Weston, Capa...they all had muon shields.
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yeah, the stratosphere was still kosher 
Muonrise, Hernandez, New Mexico by Ansel
Muonrise, Hernandez, New Mexico by Ansel
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