Re: Why is push gravity concept considered not viable by mainstream science?

Steve Carlip pointed out that
Electromagnetic waves don't interact with other
electromagnetic waves (except by truly tiny quantum effects);

Richard Saam <rdsaam@xxxxxxx> asked for references for this.

The usual phrase for this is "photon-photon scattering". A brief
bout of googling this phrase found (among others) the following pages
which look quite informative:
http://www.madsci.org/posts/archives/feb99/919892082.Ph.r.html
http://www.hep.ucl.ac.uk/opal/gammagamma/gg-tutorial.html
http://arxiv.org/abs/hep-ph/0512033
The last of these is an M.Sc thesis on the possible observability of this.

Cheng and Wu,
Phys Rev D 1, 3414 (12 June 1970),
http://prola.aps.org/abstract/PRD/v1/i12/p3414_1
give a detailed calculation of photon-photon scattering cross sections.

Chiao,
http://www.physics.berkeley.edu/research/chiao/EOY00/chiao6.pdf
gives an experimental observation, abeit in a dilute gas rather than
in a vacuum (which would be a "purer" situation).

ciao,

--
-- "Jonathan Thornburg -- remove -animal to reply" <jthorn@xxxxxxxxxxxxxxxx>
Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut),
Golm, Germany, "Old Europe" http://www.aei.mpg.de/~jthorn/home.html
"Washing one's hands of the conflict between the powerful and the
powerless means to side with the powerful, not to be neutral."
-- quote by Freire / poster by Oxfam

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