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Groups > sci.physics > #514177
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
|---|---|
| Newsgroups | sci.physics |
| Subject | Re: 'Dark Matter' |
| Date | 2015-08-16 11:09 +0200 |
| Organization | PointedEars Software (PES) |
| Message-ID | <3987332.uPPTNPNPaI@PointedEars.de> (permalink) |
| References | (13 earlier) <mqiaf6$p12$1@pcls7.std.com> <2922604.k8bpgQcGR2@PointedEars.de> <mqimbt$5fd$1@pcls7.std.com> <2180563.nrxrSpbJKA@PointedEars.de> <mqpi3b$678$1@dont-email.me> |
Poutnik wrote:
> Dne 13/08/2015 v 20:23 Thomas 'PointedEars' Lahn napsal(a):
>> Michael Moroney wrote:
>>> Therefore, photon's momentum is p = hf/c in the x direction, and the
>>> recoil must be -hf/c (that is, in the -x direction) to keep the sum zero
>>> (and conserve momentum).
>> Again, no. Whatever could recoil is _not_ a photon; it has a mass not
>> equal to zero. Its momentum is calculated *differently* than that of a
>> photon.
>
> Sure, but it does change momentum conservation.
Come again?
> If massless photon has momentum vec p, recoiling massive ion get momentum
> difference -vec p.
In the ion’s rest frame, if there is only one ion and one photon, and one
photon for each ion. No doubt about *that*.
> Eventual relativistic effects do not change it.
Nobody claimed it would. You are taking statements out of context.
> The ion velocity change has in such a case
> to be calculated by SR formula
> from the momentum change, and not otherwise.
Exactly. Which also means that it has to be taken into account how much of
the photon’s energy comes from or is converted into kinetic energy, with the
additional caveat that additional kinetic energy does not need to mean the
kinetic energy of the receiving object itself (but could as well be that of
its constituents).
You really should read the whole posting and the whole discussion before you
post a corrective follow-up. The people whom I have debated have claimed
that “Newtonian mechanics” suffices to describe the process because of “low
speeds” on “the surface of the sun” [sic], that *the Sun* would be recoiling
from photon emissions in the opposite direction of “the emission” (the same
as *everything* that absorbs photons), and that you could compute that
“recoiling speed” in a simple way, respectively. And probably I have
forgotten to mention more of the nonsense that they claimed.
PointedEars
--
“Science is empirical: knowing the answer means nothing;
testing your knowledge means everything.”
—Dr. Lawrence M. Krauss, theoretical physicist,
in “A Universe from Nothing” (2009)
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'Dark Matter' john <johnsefton288@gmail.com> - 2015-07-27 07:28 -0700
'Dark Matter' john <johnsefton288@gmail.com> - 2015-07-27 18:16 -0700
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-07-28 07:17 -0400
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-07-28 15:18 -0700
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-07-29 02:22 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-10 21:18 +0200
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-10 13:51 -0700
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-10 15:58 -0500
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-11 01:04 +0200
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-11 07:49 -0500
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-11 06:26 -0700
Re: 'Dark Matter' Sam Wormley <swormley1@gmail.com> - 2015-08-11 08:31 -0500
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-08-11 09:41 -0400
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-11 06:51 -0700
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-08-11 13:44 -0400
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-11 11:00 -0700
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-11 18:44 +0000
Re: 'Dark Matter' Sam Wormley <swormley1@gmail.com> - 2015-08-11 08:51 -0500
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-11 07:17 -0700
Re: 'Dark Matter' Sam Wormley <swormley1@gmail.com> - 2015-08-11 10:45 -0500
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-11 09:50 -0700
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-11 10:01 -0700
Re: 'Dark Matter' Mahipal <mahipal7638@gmail.com> - 2015-08-11 08:10 -0700
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 13:44 +0200
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 07:51 -0500
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-10 21:28 +0000
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-10 14:35 -0700
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-10 23:31 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 15:22 +0200
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-13 14:43 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 19:39 +0200
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-13 18:06 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 20:23 +0200
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-13 19:37 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 00:39 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 15:38 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:25 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 17:15 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 17:31 +0200
Re: 'Dark Matter' R Kym Horsell <kym@kymhorsell.com> - 2015-08-16 16:09 +0000
Re: 'Dark Matter' [OT] Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 18:47 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 10:38 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 11:09 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 12:40 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:17 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 16:46 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 10:42 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 11:21 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 12:58 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:19 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 16:49 +0200
light is magneto-electrical noTthaTguY <abu.kuanysh05@gmail.com> - 2015-08-13 19:10 -0700
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 13:49 -0500
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 20:50 +0200
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 14:03 -0500
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 00:43 +0200
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-15 17:53 -0700
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 09:34 +0200
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-08-16 08:05 -0400
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 11:36 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:00 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 16:22 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:30 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 16:56 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 11:17 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 11:26 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 13:01 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 10:14 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 10:43 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 13:07 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:21 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 17:07 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-11 01:03 +0200
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-10 23:40 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 13:41 +0200
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-13 14:54 +0000
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-13 08:13 -0700
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 10:46 -0500
Re: 'Dark Matter' noTthaTguY <abu.kuanysh05@gmail.com> - 2015-08-13 09:48 -0700
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-13 10:00 -0700
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-13 13:45 -0500
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-13 16:01 +0000
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-08-14 07:07 -0400
Re: 'Dark Matter' noTthaTguY <abu.kuanysh05@gmail.com> - 2015-08-14 10:39 -0700
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 20:29 +0200
Re: 'Dark Matter' moroney@world.std.spaamtrap.com (Michael Moroney) - 2015-08-13 19:14 +0000
Re: 'Dark Matter' Felipe Delgado <fd@spreadspectrum.org> - 2015-08-13 19:28 +0000
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-15 15:38 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 12:23 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:04 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 16:32 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 16:33 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 17:02 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 19:24 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 20:31 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 22:16 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 22:38 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 20:45 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 22:32 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 22:57 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 23:22 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 23:34 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 23:38 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-18 07:43 +0200
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-18 08:07 -0700
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 21:40 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 22:35 +0200
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-16 23:36 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-16 23:50 +0200
Re: 'Dark Matter' Poutnik <poutnik4nntp@gmail.com> - 2015-08-17 07:56 +0200
Re: 'Dark Matter' Odd Bodkin <bodkinodd@gmail.com> - 2015-08-11 07:48 -0500
Re: 'Dark Matter' Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-08-13 13:41 +0200
Re: 'Dark Matter' "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-07-29 13:27 -0700
Re: 'Dark Matter' "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-16 14:42 -0700
Re: 'Dark Matter' "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-18 14:01 -0700
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-18 20:21 -0700
Re: 'Dark Matter' benj <nobody@gmail.com> - 2015-08-19 01:26 -0400
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-08-19 06:07 -0400
Re: 'Dark Matter' Sam Wormley <swormley1@gmail.com> - 2015-08-19 08:05 -0500
Re: 'Dark Matter' john <johnsefton288@gmail.com> - 2015-08-19 07:04 -0700
Re: 'Dark Matter' HVAC <Mr.HVAC@gmail.com> - 2015-08-19 19:14 -0400
Re: 'Dark Matter' "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-19 09:12 -0700
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