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originally posted by: dashen
and I don't think the detection has to do with the Delta in temperature but rather the photons maybe touching off a reaction in the nerve endings where the potassium channels have enough energy to make thenerves spike.
That shows 2 or 3 photons, but as I said you'd need more than 9 times as much energy to eject a second electron from sodium as the first electron and you won't get that much from two or three photons. Statistically it might happen very rarely but probably not enough to ever measure.
originally posted by: dashen
a reply to: Arbitrageur
Multiple photon absorption and ionization is indeed possible without highly energetic wavelengths apparently
I think that's debatable. The photoelectric effect can eject electrons from metallic sodium with visible light, that much is true. If it was ejecting electrons from individual sodium atoms then you'd have a Na+ ion, but that's not what the experiments are doing, at least not the ones I've seen. If you can find an experiment like that I'd like to see it.
originally posted by: dashen
a reply to: Bedlam
sodium is ionized by visible light
The conduction electrons in a metal are non-localized (i.e., they are not tied to any particular atoms).
I incline to think Dr Loos is a real person.
Sometimes the pulses cannot be seen on the monitor. "This is unfortunate," the patent notes, "since it opens a way for mischievous application of the invention, where by people are exposed unknowingly to manipulation of their nervous systems for someone else's purposes.
Such application would be unethical and is of course not advocated. It is mentioned here in order to alert the public to the possibility of covert abuse that may occur while being online...."
He was talking about both as far as I can tell, which is why I said he had them confused. He was trying to use experiments with sodium metal to make inferences about what would happen with sodium ions in solution, which of course were non-sequitur inferences for reasons I tried to explain.
originally posted by: Bedlam
a reply to: Arbitrageur
THAT's what he's talking about. I thought he was talking about sodium ions in solution.
Dashen, you realize you won't have metallic sodium in your body, right?
What did you have in mind there?
The latest comes from Boston where a Harvard Medical School research team has whipped up a way for a human brain to control a rat's brain. This so-called brain-to-brain interface enables a human subject to move a rat's tail without getting wires plugged into her head.
That doesn't mean it's a simple process. The process starts with a strobe light, of all things. The strobe stimulates the human subject's brain which then puts out brainwave signals that are picked up by an EEG. The EEG data is then translated into an ultrasonic frequency that's blasted into the rat's head. Equipment aside, it's akin to a kind of telepathy, as it's fairly non-invasive.