Glad you mentioned the plates. Why are the photos taken on the moon not affected by radiation?
i would guess the same reason they had to bring special equipment to measure the radiation, normal film isnt effected by it
If Kodak developed special film for the lunar missions, THEY ARE NOT AWARE OF IT. Kodak claims that the film they provided was in fact standard Ektachrome 64 ASA, used on earth. Which leaves us with the question still, how could the camera possibly work on the moon and even if it did how did the film come out visible?
Film is altered by a mere 5 rems of radiation. On the way to the moon the astronauts were exposed to 500 rems of radiation, which is enough to result in nausea, vomiting and diarrhea (100% chance within four hours), damage to the gastrointestinal tract, cataracts, loss of vision, bone marrow damage (Moderate to severe), and a 100% chance of permanent sterility within one to two hours. I’ll deeply discuss radiation in my next article. Think about at the airport when you have to put your camera in a lead box to pass through the detector, if you don’t the film will be ruined by radiation. Even in severe sunlight film can be destroyed. Not one of the Apollo pictures has any sign of radiation damage. The astronaut’s suits would need to have been made of lead to protect them from radiation. No lead was present on the space suits or on the rocket.
http://nicholasweiss.com/NASA2.html
Film comes in two parts - the base and the emulsion. The base is the celluloid strip inside the cassette, and the emulsion is the photosensitive chemical coating it. The most difficult part is coming up with an emulsion that produces a realistic colour balance, and that's probably what Kodak were thinking about. Indeed, Apollo used the commercially available Ectachrome E-3 emulsion, so there was nothing new there. The Estar base, however, was made from extra-thin polyester material formulated for cold temperatures, specifically aerial and high-altitude photography.
About the radiation: Firstly, rem (Röntgen equivalent man) is a measurement of absorbed dosage, specifically for human tissue. It has
no meaning for anything else. Time is of slight importance, since the body can recover more easily from a short, high-intensity dose than a longer or repeated low-intensity dose. If you're talking about equipment or accumulated dosage in general, the standard units are gray or rad. And no, you can't just switch the units - they mean different things.
Secondly: Where in the name of Bog did those figures come from? They're so wildly divorced from reality that they're not even answering subpoenas! The highest dosage absorbed by any mission was Apollo 12, around 2 rems for the astronauts (which means a lower figure in rads), owing to a minor solar event during the mission. Well below even your own figure for the minimum radiation that would affect film.
Radiation data for the Van Allen belts are available, but at a cost. As with any purchased service, the source (NASA et al) would be held liable if the figures were too far off, and any attempt at artificially lowering the figures would be quickly discovered by satellite manufacturers, not to mention other nations. It is, however, fairly complicated to go from measured particle flux to an actual dosage figure, which is why the astronauts all carried dosimeters.
Thirdly: Why would you use lead to shield against particle radiation? Polyethylene or some similar material consisting of low-weight isotopes produces far less secondary radiation when stopping incoming particles. Lead
is useful against X and gamma radiation, both of which occur only in minuscule amounts in cislunar space. Add to this that you're just as exposed to them in LEO as on the lunar surface, since the magnetic field doesn't block them at all.
Fourthly: The Russians had already sent a probe carrying a few different small animals on a round-trip around the moon and back to a landing a few years earlier. All the animals survived the journey.