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Groups > sci.physics > #681144
| Subject | Re: Dark Energy |
|---|---|
| Newsgroups | sci.physics |
| References | <37ee30d4-3feb-4f88-9b7a-aee563d04169@googlegroups.com> |
| From | Keith Stein <keithstein111@gmail.com> |
| Message-ID | <7LMAC.1594029$jx2.573439@fx03.am4> (permalink) |
| Organization | virginmedia.com |
| Date | 2018-04-15 19:21 +0100 |
On 11/04/2018 03:12, john wrote:
> ........ We notice the galaxies accelerating apart, and we say "expansion". But we could also say "dilution". The layers below ours could be increasing because of a flow of this smaller, unseen Matter coming into our part of the Universe. Matter/energy too small to see, therefore "dark". Dark energ
We don't REALLY "notice the galaxies accelerating apart" eh!
In fact we don't really notice the universe expanding at all.
What we do notice is a red-shift which increases exponentaly
with distance from Earth, or possibly with time since emission.
Searching for an alternative explanation of the Hubble Red Shifts, it
occurred to me that if the speed of light is slowing down, then this
will necessarily lead to increasing red-shift with increasing distance,
as observed by Hubble et. al., without any expansion at all.
Merely by assuming dc = -K c dt ..................(1)
I was led to c = c(0) e^-Kt ...............(2)
and on to Red-Shift = e^-Kt - 1 .........(3)
K ~= 10^-10 /year
t = time in years
Only after starting the PHYSICS PRIZE thread, in which i was trying to
enlist the help of sci.physics.relativity readers to obtain a more
accurate value of K, did the obvious solution occur to me...........
K = H = Hubble's Constant
and t = -t ( so times past become +ve)
which substituted in (3) gives:
Red-Shift = e^Ht - 1 .........(4)
then for times which are small compared to 1/H (i.e. small compared
to the 'age of the universe'), we may use the approximation:
e^x ~= 1 + x .................(5)
So for t << 1/H we have:
Red-Shift = H * t ............(6)
which is of course the normal "Hubble's Law", valid only
for modest times into the past ( t < ~5 billion years).
As our telescopes manage to see further out into space, and therefore
further back in time, we will find that the normal linear Hubble's Law
expressed in equation(6), will have to be replaced by the more accurate
exponential form expressed in equation(4). This is indeed what is found
in observatories all around the world eh!
On 11/04/2018 03:12, john wrote:
> ........ We notice the galaxies accelerating apart, and we say
"expansion". But we could also say "dilution". The layers below ours
could be increasing because of a flow of this smaller, unseen Matter
coming into our part of the Universe. Matter/energy too small to see,
therefore "dark". Dark energy.
So what i was wondering John is:
" Do you think these increasing layers below ours
could possible be causing the speed of light to
decrease by about one part in ten billion per year?"
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Dark Energy john <johnsefton288@gmail.com> - 2018-04-10 19:12 -0700
Re: Dark Energy pnalsing@gmail.com - 2018-04-10 19:18 -0700
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-10 19:27 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-11 04:07 +0000
Re: Dark Energy "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-04-11 00:16 -0700
Re: Dark Energy Lofty Goat <rlwatkins@gmail.com> - 2018-04-11 22:04 -0500
Re: Dark Energy mitchrae3323@gmail.com - 2018-04-11 20:31 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-12 03:56 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-12 09:12 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-12 16:54 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-12 12:55 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-12 23:16 +0000
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-12 23:21 +0000
Re: Dark Energy "reber G=emc^2" <herbertglazier0@gmail.com> - 2018-04-14 12:24 -0700
Re: Dark Energy "hanson" <hanson@quick.net> - 2018-04-14 12:41 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-12 23:16 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-12 16:22 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-13 00:42 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-12 18:18 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-13 01:59 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-12 19:17 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-13 03:02 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-13 08:05 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-13 15:32 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-13 08:44 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-14 02:06 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-13 19:19 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-14 02:40 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-13 19:52 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-14 02:37 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-13 19:49 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-14 12:23 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-14 08:00 -0700
Re: Dark Energy Odd Bodkin <bodkinodd@gmail.com> - 2018-04-13 15:49 +0000
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-13 06:25 +0000
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-13 06:14 +0000
Re: Dark Energy "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-04-12 14:18 -0700
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-10 19:29 -0700
Re: Dark Energy pnalsing@gmail.com - 2018-04-10 20:15 -0700
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-10 20:36 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-11 04:14 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-10 21:30 -0700
Re: Dark Energy moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-04-11 04:46 +0000
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-10 21:50 -0700
Re: Dark Energy Keith Stein <keithstein111@gmail.com> - 2018-04-15 19:21 +0100
Re: Dark Energy john <johnsefton288@gmail.com> - 2018-04-15 19:26 -0700
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