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You can see this in photos and movies from Chernobyl. In some pictures, like those taken from the roof, there's a noticeable tint to the bottom of the film as t

by lutorm 16y ago

You can see this in photos and movies from Chernobyl. In some pictures, like those taken from the roof, there's a noticeable tint to the bottom of the film as the radiation comes up from below. There's also a lot of noise like in the picture shown here but much worse, in some movies from inside the reactor. Pretty creepy. You can see some of the noise in this video, but the bad youtube quality makes it difficult: http://www.youtube.com/watch?v=jKnFurg5-Ag http://www.youtube.com/watch?v=jKnFurg5-Ag

jberryman 16y ago
Do you have a link for those photographs? I would think the film would be saturated generally rather than from below. Also in an SLR the top of the resulting image would be towards the ground while the film was in the camera, no?
- lutorm 16y ago
  Your image reversal point is a good one. It might be that it was reversed in the images, I don't really remember. I couldn't find the photographs, but they are mentioned at some pointsin the "Battle for Chernobyl" movie: http://topdocumentaryfilms.com/the-battle-of-chernobyl/ http://topdocumentaryfilms.com/the-battle-of-chernobyl/ (Highly recommended movie, btw. Very freaky.) (Also noticed that it's at Google video. Watch it while you can!)
nostromo 16y ago
Thanks for the link. At about 2:30 you can see lots of 'stars' in the video. http://www.youtube.com/watch?v=jKnFurg5-Ag&t=2m28s http://www.youtube.com/watch?v=jKnFurg5-Ag&t=2m28s
AngryParsley 16y ago
Depending on the exposure, you can also see noise in photos taken in space. http://upload.wikimedia.org/wikipedia/commons/archive/9/95/20101117130624%21Tracy_Caldwell_Dyson_in_Cupola_ISS.jpg http://upload.wikimedia.org/wikipedia/commons/archive/9/95/2... is a decent example. The cameras used by the ISS crew are pretty high-quality, so I doubt all those hot spots are from a bad sensor. They're most likely cosmic rays.
- danvet 16y ago
  Looks like taken with rather dim lighting, i.e. high-iso. In which case all these dots in the dark area could be explained as hot pixels (pixels that have a tiny bit of leakage that then shows up when massively amplified). Of course, that leakage might be due to comsic rays ;-) but the amount of them doesn't look worse than what you might get on earth (depening upon circumstances). Also, with really long exposures, this leakage tends to add up, too.
  - AngryParsley 16y ago
    EXIF data days the exposure time was 1/1600th of a second at ISO200. The earth is really bright and that is a ton of hot spots for such a low ISO, fast exposure.

by lutorm 16y ago

jberryman 16y ago

Do you have a link for those photographs? I would think the film would be saturated generally rather than from below. Also in an SLR the top of the resulting image would be towards the ground while the film was in the camera, no?

lutorm 16y ago
Your image reversal point is a good one. It might be that it was reversed in the images, I don't really remember. I couldn't find the photographs, but they are mentioned at some pointsin the "Battle for Chernobyl" movie: http://topdocumentaryfilms.com/the-battle-of-chernobyl/ http://topdocumentaryfilms.com/the-battle-of-chernobyl/ (Highly recommended movie, btw. Very freaky.) (Also noticed that it's at Google video. Watch it while you can!)

nostromo 16y ago

Thanks for the link. At about 2:30 you can see lots of 'stars' in the video. http://www.youtube.com/watch?v=jKnFurg5-Ag&t=2m28s http://www.youtube.com/watch?v=jKnFurg5-Ag&t=2m28s

AngryParsley 16y ago

Depending on the exposure, you can also see noise in photos taken in space. http://upload.wikimedia.org/wikipedia/commons/archive/9/95/20101117130624%21Tracy_Caldwell_Dyson_in_Cupola_ISS.jpg http://upload.wikimedia.org/wikipedia/commons/archive/9/95/2... is a decent example. The cameras used by the ISS crew are pretty high-quality, so I doubt all those hot spots are from a bad sensor. They're most likely cosmic rays.

danvet 16y ago
Looks like taken with rather dim lighting, i.e. high-iso. In which case all these dots in the dark area could be explained as hot pixels (pixels that have a tiny bit of leakage that then shows up when massively amplified). Of course, that leakage might be due to comsic rays ;-) but the amount of them doesn't look worse than what you might get on earth (depening upon circumstances). Also, with really long exposures, this leakage tends to add up, too.
- AngryParsley 16y ago
  EXIF data days the exposure time was 1/1600th of a second at ISO200. The earth is really bright and that is a ton of hot spots for such a low ISO, fast exposure.