Compaq
Been spending a lot of time on here!
- Joined
- Aug 29, 2010
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- Norway
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Yes, I meant silver ion.
Ah, yes. Black and white film isn't much affected by red light - it's low in energy, with larger wavelengths. But I thought using UV lamps was normal to light up the darkroom? UV light is strong in energy, and if visible light can throw off electrons, surely UV-light can? Or, wait a minute, the development of the film is done in complete darkness inside these small bucket things? After the fixer, there won't be much un-reacted crystals to be affected by the UV-light? But that's much later in the process, though.
Would it be possible to draw a small section of the lattice where light hits? Just to visualize it? I think in images, especially in chemistry, but I can't visualize what's happening within the lattice. Halogen ion loses an electron, but does the halogen atom remain in the lattice? No, it migrates out to be "picked up" by a receptor. Does the silver ion travel toward this "hole" in the lattice? And the electron as well. If they arrive at the same time, the silver ion is reduced to elementary silver. The more light that hits these grains, the larger will these pure silver accumulations be => brighter image (though darker on the negative). It's this I'm having trouble visualizing... and I'm not even sure I recapped it correctly
Thanks for the help!
where the light quanta aren't energetic enough to dislodge an electron
Ah, yes. Black and white film isn't much affected by red light - it's low in energy, with larger wavelengths. But I thought using UV lamps was normal to light up the darkroom? UV light is strong in energy, and if visible light can throw off electrons, surely UV-light can? Or, wait a minute, the development of the film is done in complete darkness inside these small bucket things? After the fixer, there won't be much un-reacted crystals to be affected by the UV-light? But that's much later in the process, though.
Would it be possible to draw a small section of the lattice where light hits? Just to visualize it? I think in images, especially in chemistry, but I can't visualize what's happening within the lattice. Halogen ion loses an electron, but does the halogen atom remain in the lattice? No, it migrates out to be "picked up" by a receptor. Does the silver ion travel toward this "hole" in the lattice? And the electron as well. If they arrive at the same time, the silver ion is reduced to elementary silver. The more light that hits these grains, the larger will these pure silver accumulations be => brighter image (though darker on the negative). It's this I'm having trouble visualizing... and I'm not even sure I recapped it correctly
Thanks for the help!