John K Clark
jonkc at bellsouth.net
Tue Jan 6 16:33:06 UTC 2009
----- Original Message -----
From: "John K Clark" <jonkc at bellsouth.net>
To: "ExI chat list" <extropy-chat at lists.extropy.org>
Sent: Monday, January 05, 2009 5:36 PM
Subject: [ExI] Instantaneous?
> In the current issue of the journal Science an experimental measurement of
> the time it takes for an electron to tunnel through a barrier was made.
> Theory predicted it should take somewhere between 500 and 600 attoseconds
> depending on the breaks. An attosecond is a billionth of billionth of a
> second; an attosecond is to a regular second as a second is to the age of
> the universe.
> The odd thing is that when an experimental measurement was actually made
> was found that the time for that electron to tunnel through that barrier
> less than 12 attoseconds, how much less nobody knows as that is the limit
> the experiment's accuracy.
> I don't know quite what to make of that and I find I'm not alone in my
> puzzlement. It's weird.
> John K Clark
> extropy-chat mailing list
> extropy-chat at lists.extropy.org
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