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2Physics Quote:
"Can photons in vacuum interact? The answer is not, since the vacuum is a linear medium where electromagnetic excitations and waves simply sum up, crossing themselves with no interaction. There exist a plenty of nonlinear media where the propagation features depend on the concentration of the waves or particles themselves. For example travelling photons in a nonlinear optical medium modify their structures during the propagation, attracting or repelling each other depending on the focusing or defocusing properties of the medium, and giving rise to self-sustained preserving profiles such as space and time solitons or rapidly rising fronts such as shock waves." -- Lorenzo Dominici, Mikhail Petrov, Michal Matuszewski, Dario Ballarini, Milena De Giorgi, David Colas, Emiliano Cancellieri, Blanca Silva Fernández, Alberto Bramati, Giuseppe Gigli, Alexei Kavokin, Fabrice Laussy, Daniele Sanvitto. (Read Full Article: "The Real-Space Collapse of a Two Dimensional Polariton Gas" )

Tuesday, July 19, 2005

Through Einstein's Eyes

Relativistic ride on a roller coaster &
On a desert road at relativistic speed (0.76 times the speed of light)

If you love relativity and get amazed thinking about all its seemingly wierd
concepts and consequences, you would surely like the following websites of
the Physics department of Australian National University (ANU):

Seeing Relativity :
The Australian National University relativistic visualization project has
used supercomputers to simulate what we might see in a world where the
effects of Einstein's theory of special relativity are everyday experiences.
You can also download two extended relativistic optics videos,
Visualizing Special Relativity, and Seeing Relativity, in RealPlayer format.
A complete printer-friendly commentary is also available for the videos.

Through Einstein's Eyes Online :
You may also visit the Through Einstein's Eyes site to find out about their
latest multimedia work on relativistic visualisation.



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