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Electron in Motion

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An electron rides on a light wave after just having been pulled away from an atom. Credit: Lund University Scientists have filmed an electron in motion for the first time, using a new technique that will allow researchers to study the tiny particle's movements directly. Previously it was impossible to photograph electrons because of their extreme speediness, so scientists had to rely on more indirect methods. These methods could only measure the effect of an electron's movement, whereas the new technique can capture the entire event. Extremely short flashes of light are necessary to capture an electron in motion. A technology developed within the last few years can generate short pulses of intense laser light, called attosecond pulses, to get the job done. "It takes about 150 attoseconds for an electron to circle the nucleus of an atom. An attosecond is 10-18 seconds long, or, expressed in another way: an attosecond is related to a second as a second is related to the age of the universe," said Johan Mauritsson of Lund University in Sweden. Using another laser, scientists can guide the motion of the electron to capture a collision between an electron and an atom on film. The length of the film Mauritsson and his colleagues made corresponds to a single oscillation of a wave of light . The speed of the event has been slowed down for human eyes. The results are detailed in the latest issue of the journal Physical Review Letters.

Channel: Education
Uploaded: February 25, 2008 at 6:59 pm
Author: freedomlost2007

Length: 01:12
Rating: 4.55
Views: 45256

Tags: atom  education  electron  electronics  science  

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Video Comments

AnduinX (July 23, 2008 at 10:06 pm)
wilbo, you're an arrogant ass. I'd wager there's a great deal of Americans who are and will always be way smarter than you'll ever be.
Chstr (July 17, 2008 at 6:33 am)
there's some clever joke to be had here concerning onions and anions...
mwilson14 (July 9, 2008 at 5:57 pm)
I'm just now reading more into Milo Wolff's WSM theory. I came across it a couple of years ago actually and decided to further educate myself before forming any kind of opinion on WSM. Personally I can't say he is, without a doubt, right/correct, but it's nice to see someone exploring alternative theory. I've stumbled upon WSM because I have a problem with the common acceptance of the big bang model and the redshift explaination taken as total fact. *Wish I had more room and time to write.*
rachidistamboulio (July 6, 2008 at 4:54 pm)
ah well ... thanks a lot :)
M0reTeaVicar (July 6, 2008 at 4:28 pm)
Interesting question. What is happening here is at a time scale much shorter (by a factor of about 2000) than the period of oscillation of the intense laser field. Under these "dynamics" the electron appears stationary, and light is not really behaving as a wave, but a chain of photons - it is the number of photons per unit time (which is the energy of the laser field) that determine the fringe spacing, and the ionisation conditions between electron and nucleus.
inverterlee (July 6, 2008 at 2:11 pm)
amazing and what is inside the electron? It just goes on and on
rachidistamboulio (July 4, 2008 at 5:32 pm)
why can't we see the Dopler effect (the phase shifts and stuff ....) ?
marketer1977 (July 3, 2008 at 9:34 pm)
This is incredible, just like a micro universe with galaxies, planets, stars and life into it. I could cry, Just what carl sagan said
rachidistamboulio (July 1, 2008 at 3:06 pm)
instead of being rude to people , can you explain this video please ? of all the explications that have been already said, i haven't found one that can REALLY explain why does the electron look like this . thanks IF you reply
MachoBMan (June 30, 2008 at 10:33 pm)
can people please stop posting these shallow oversimplistic views. Here's an idea instead of pretensiously spewing speculation how about you do some reading a research 1st. This particular bit a mindless whimsey seems to be quite prevalent amoung people who are obliviouse to the past 200 years of reasearch and test.PLease god please tell your friends that the macroscopic and the microspopic are not the same damn thing, saturn in not in a drop of watter. let it rest please!

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