Josh66
Been spending a lot of time on here!
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meanwhile I STILL DON'T UNDERSTAND
Which part?
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meanwhile I STILL DON'T UNDERSTAND
Yes the latent image! All that business about photons moving electrons into lattice interstitial imperfections in the crystal surface and attracting silver ions and forming atoms blah blah blah WHAT DOES IT MEAN
It means two things.Yes the latent image! All that business about photons moving electrons into lattice interstitial imperfections in the crystal surface and attracting silver ions and forming atoms blah blah blah WHAT DOES IT MEAN
Probably not. All that can really be done is to define all the terms, which is a lot of definitions.
Anyways. The point of a silver halide crystal is that it is inherently unstable. Hit it with light, and it breaks down a little into pure silver and pure halide. Just a little, usually (there are cases like "printing out paper" where it breaks down more thoroughly in normal usage).
Developer also breaks down silver halide crystals into pure silver and either pure halide of some other halide compound.
Developer has an easier time breaking down the crystals where light has given it a head start by breaking it down a little already.
So, if you develop for the right amount of time, the developer will mostly break down crystals that got hit with a bunch of light, and will mostly NOT break down the crystals there were left in the darkness.
Now you've got lots of pure silver where there was light, and very little where there wasn't.
Fixer dissolves silver halides, but not silver. Fixer leaves just the silver behind.
So this formula is correct?
Ag[SUP]+[/SUP]Br[SUP]-[/SUP] (crystal) + hv (radiation) --> Ag[SUP]+[/SUP] + Br+ e[SUP]-[/SUP]