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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" )

Sunday, February 13, 2005

Physics Book Recommendation

[Category: Semi-popular]

"The First Three Minutes: A modern view of the origin of the Universe"
- Steven Weinberg
[1993 Publisher: Basic Books, NY]

Steven Weinberg won Nobel Prize in 1979 with Sheldon Glashow
and Abdus Salam for their path-breaking work on unifying
Electromagnetic and Weak Nuclear interactions in matter
[read our next posting]. He is Josey Professor of Science and
Astronomy at University of Texas at Austin.

This book came out first in 1977 and became an instant hit among
all people interested in Physics and other people who were just
wondering about this Universe and its origin but was not getting
something that could tell them this story spanning a large spectrum
of Physics topics.

Weinberg gives a frame-by-frame almost movie-like account of
what happened in those very crucial first few moments after the
Big Bang as we understand and guess from what we know or
understand from General Physics and Astrophysical observations.

This book is a great synthesis of cosmology, particle physics and
Astrophysics and tells the story in great style.

We put this in "Semi-popular" category because some exposure
to College-level Science is needed in order to fully appreciate the
greatness of the content of this classic book.


1 Comments:

At 4:41 AM, Blogger oceanskies79 said...

Thanks for the blog. The topic of the origin of the Universe sounds interesting. What I fear though is that I may not have sufficient prior knowledge to understand the concepts through lay-man language. Perhaps you could write a short summary of this topic in lay-man language to help people like me along? Thanks.

 

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