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Jim Kelley wrote:
Richard Clark wrote: Jim Kelley wrote: Born and Wolf has an interesting comment in the section on total reflection. "...the electromagnetic field in the second medium does not disappear, only there is no longer a flow of energy across the boundary." your source, and yet unable or unwilling to confront this single observation. Apparently that would mean the waves aren't traveling at the speed of light and it would violate his "waves cannot exist without energy" law of physics, so therefore the book is wrong. Wrong. All it means is that reflected energy doesn't make it across the match point. Seems I read that in _Reflections_ a quarter century ago. Reflected energy traveling at the speed of light is re-reflected at the speed of light in the opposite direction. Wave cancellation accomplishes that feat. Regarding wave cancellation: http://micro.magnet.fsu.edu/primer/j...ons/index.html "... when two waves of equal amplitude and wavelength that are 180-degrees out of phase with each other meet, they are (canceled but) not actually annihilated. All of the photon energy present in these waves must somehow be recovered or redistributed in a new direction, according to the law of energy conservation. (There are only two directions available in a transmission line.) Instead, upon meeting, the photons are redistributed to regions that permit constructive interference, so the effect should be considered as a redistribution of light waves and photon energy (back toward the load) rather than the spontaneous construction or destruction of light." (Words in parentheses are mine added for clarity.) -- 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 =--- |
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