ml wrote:
what would be the 'momentum' your referring to? is their a
knetic/stored piece i am misssing? or are you just referring to like
the flywheel effect for ex a large coil might have

In 1619, Kepler proposed that it was the pressure (momentum)
of sunlight that blows back a comet's tail. Maxwell, in 1873
said: "In a medium in which waves are propagated, there is a
pressure (momentum) in the direction normal to the waves ..."

From "Optics", by Hecht: "One of the most significant properties
of the electromagnetic wave is that it transports energy and
momentum." ... "Indeed, whenever we have a flow of energy, it's
reasonable to expect that there will be an associated momentum -
the two are the related time and space aspects of motion."

And, of course, energy and momentum are two things that must
necessarily be conserved. The bottom line is that if there
are any reflected waves that don't reach the source (and also
are not dissipated), they must necessarily have had their direction
of energy and momentum reversed back toward the load. Anything
else would violate the laws of physics.
--
73, Cecil http://www.qsl.net/w5dxp


----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---