Re:Manhole cover thought to be propelled into space
by PeterWhittaker on Saturday November 02, 2013 @09:20AM
(#6659090)
I've been musing about this since posting a comment yesterday and I'm leaning to a call of "No, not really", based on the "blur" in the image.
If this object was launched at escape velocity, it was doing at least 11km/s. If the camera had a shutter speed of 1/500 of a second, the object would have traveled at least ~22m during exposure. We don't know the ISO of the film, but something covering that much distance leaving a blur? Would it even leave a smudge? And with imperfect lighting, no less.
The slower the shutter speed, the less likely there is to be an image. Would a camera expert care to comment?
If you follow the links in the original article, you find more information at [1], [2], and [3]. It seems dubious....
If this object was launched at escape velocity, it was doing at least 11km/s. If the camera had a shutter speed of 1/500 of a second, the object would have traveled at least ~22m during exposure. We don't know the ISO of the film, but something covering that much distance leaving a blur? Would it even leave a smudge? And with imperfect lighting, no less.
The slower the shutter speed, the less likely there is to be an image. Would a camera expert care to comment?
If you follow the links in the original article, you find more information at [1], [2], and [3]. It seems dubious....
[1] http://en.wikipedia.org/wiki/Operation_Plumbbob#Propulsion_o...
[2] http://nuclearweaponarchive.org/Usa/Tests/Plumbob.html#Pasca...
[3] http://nuclearweaponarchive.org/Usa/Tests/Brownlee.html