cliveh
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- Oct 9, 2010
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- 35mm RF
I've done the mathematics and can confirm that film is heavier after exposure. The increase in weight comes entirely from the subject matter. That's why cameras are made light-tight except (obviously) for the lens. The increase in weight absolutely confirms the physical link between subject and photograph.
For the record the increase in weight of an 8x10 sheet of medium speed film receiving a middling exposure is of the order of 10^-23 kilograms...in words "ten to the minus 23 kilograms". Do the calculation yourself. Check my numbers.
10^-23 kg is a very small mass but it it incomparably greater than zero. For those who doubt that such a small mass can have an perceptible effect I propose the following experiment. Instead of film place your eye at the focal plane of a camera, look at the back of the lens, and make an exposure. Did you see anything? Yes, of course! Ten to the minus 23 kilograms is not a lot of mass but it has impact because it arrives with a muzzle velocity of 300 000 kilometres a second!
Maris, can you quote an approximate % in weight gain of film after exposure and can this technique be used to way a human soul after death?