[sotd] June 23, 2004 [Bose-Einstein Condensation]
- From: "The Site of the Day" <sotd@xxxxxxxxxxxxxx>
- To: sotd@xxxxxxxxxxxxx
- Date: Wed, 23 Jun 2004 09:43:54 -0300
Site of the Day for Wednesday, June 23, 2004
Bose-Einstein Condensation
Today's site, from the Department of Physics at the University of Colorado,
Boulder, offers some heavy-duty physics concepts in a clear and hands-on
presentation. Gentle Subscribers, who concluded their science education
prior to 1995 and missed this long-sought development in world of physics,
will discover the principles underlying this fascinating concept.
"Bose-Einstein Condensation in a gas: a new form of matter at the coldest
temperatures in the universe ... Predicted 1924 ... Created 1995" - from
the website
The site is designed in a question/answer format to explain what
Bose-Einstein Condensation is and delves into topics such as the extremely
low temperatures required -- a few billionths (0.000,000,001) of a degree
above Absolute Zero (-459 degrees Fahrenheit) -- to detect BEC. In
discussing the role of lasers in cooling and the creation of "optical
molasses", the presentation features numerous interactive applets to
illustrate the concepts involved. A representation of the Bose-Einstein
condensate is also provided, along with a Quicktime movie illustrating a
cloud of atoms cooling down and condensing. The presentation wraps up with
some interesting speculations about possible uses for BEC.
Swing over to the site for an excellent introduction to this aspect of low
temperature physics at:
http://www.colorado.edu/physics/2000/bec/
A.M. Holm
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