00:01
All right, so let's say we've got this really nice rock down here.
00:06
It's a good rock, it's a pretty looking rock, and we shine some uv light on it, and the rock appears to be glowing with the uv light on it.
00:15
What is causing that to happen? well, the uv light is actually putting energy into the system.
00:23
As that energy goes into the system, it excites the electrons up to their next excited state.
00:29
Now, they can't stay there forever without, you know, a constant flow.
00:34
Of energy in there, which this isn't going to give the nice even flow, so it will eventually drop back down and go back up...