Speed of Light gets Slower?
in [Relativity]
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From: harald on 8 Jul 2010 16:49 On Jul 8, 9:55 pm, dlzc <dl...(a)cox.net> wrote: > Dear harald: > > On Jul 8, 12:00 pm, harald <h...(a)swissonline.ch> wrote: > > > > > On Jul 8, 8:22 pm, glird <gl...(a)aol.com> wrote: > > > > gl: The speed of light is c = # meters/second. > > > Suppose that # = 1, and the speed of light > > > decreases by 50%. By the rule of Physics > > > cited by David, instead of this being measured > > > as c = .5 meters/sec, the meter rod would > > > become half as long as it was so c = # > > > meters/second remains a constant regardless of > > > the actual speed of light! > > > > David:I think you meant "twice" as long ... > > > > If the speed of light slows to 50%, then > > > instead of being 1 unit/sec it would be .5 > > > units/sec. In order to measure that is c = 1, > > > a unit rod would have to shrink to half its > > > length, not expand to twice its length. > > You did not have the rod shrink. You had it stay the same, yet > indicate it would indicate half the size. > > > > Harald: Please one of you fill me in, why > > > only length would change and not frequency? > > > > The frequency is the number of waves that > > > pass a given point per second. if the given > > > point is moving tooward oncoming waves, more > > > of them will pass it per second and the > > > frequency will increase. If the given point, > > > say the eye of an observer, is moving in the > > > same direction as the oncoming waves, les of > > > them will pass per second so the frequency > > > will decrease. It is therfore evident that the > > > frequency depends on (at least) three things: > > > a] How many waves emit per second. > > > b] The speed and direction of the observer wrt > > > the emitting object. > > > c] The density of the space-filling compressible > > > material that conducts light. (If its density > > > increases, the speed of light decreases; so > > > the frequency will too.) > > > No, the frequency of a dispersion-free wave is > > not a function of the propagation speed. As > > Einstein put it, the number of wave crests is > > conserved. > > > And I simply meant clock frequency but let's > > continue this path of observed frequency spectrum > > from distant stars, which is directly related, as > > it also came up in the article that I found, here > > once more: > > http://www.wnd.com/news/article.asp?ARTICLE_ID=39733 > > > It is claimed (by Setterfield) that the redshift > > is affected by the change of light speed. > > Actually Setterfield proposed that the redshift was *entirely* due to > a change in c, and whatever corresponding secular changes he also > described (h for example). > > > I guess that such an effect should reduce the > > observed redshift - correct? > > Yes, it should arrive at a blue shift in a biblical static Universe. > > But since the OP and his various subsequent nyms is trolling, then the > three of us need only stay satisfied that we are "on topic". :-)) Harald
From: Frederick Williams on 8 Jul 2010 16:52 glird wrote: > > ... The OP doesn't mean that the speed of light is getting slower, he means that the speed of light is getting less. -- I can't go on, I'll go on.
From: Henry Wilson DSc on 8 Jul 2010 18:28
On Wed, 7 Jul 2010 17:23:30 -0700 (PDT), "Sue..." <suzysewnshow(a)yahoo.com.au> wrote: >On Jul 6, 6:04�pm, Victar Shawnberger <vic...(a)dcemail.com> wrote: >> according to a bible study, measurements of speed of light done in the >> past revealed much larger values than those they measure today >> >> so is not about accuracy, for instance they never measured it under >> 299000 km/s >> >> hence i could safely predict a speed of light under 298000 km/s in >> 2100 >> >> why is the speed of light getting slower, entropy as well? > ><< In 1946, Louis Essen and A.C. Gordon-Smith establish the >frequency >for a variety of normal modes of microwaves of a microwave cavity of >precisely known dimensions. As the wavelength of the modes was known >from the geometry of the cavity and from electromagnetic theory, >knowledge of the associated frequencies enabled a calculation of the >speed of light.[86][88] >The Essen�Gordon-Smith result, 299,792�9 km/s, was substantially more >precise than those found by optical techniques.[86] By 1950, repeated >measurements by Essen established a result of 299,792.5�3.0 km/s.[89] That is the value of the speed of light wrt its source. This appears to be always numerically equal to the universal constant c, which has dimensions LT^-1 >http://en.wikipedia.org/wiki/Speed_of_light > >Evidently the microwave ovens of biblical times didn't have to >be concerned about yet uninvented heart pacemakers. They >could be constructed to run a bit faster. ;-) > >http://en.wikipedia.org/wiki/Electric_constant >http://en.wikipedia.org/wiki/Magnetic_constant >http://en.wikipedia.org/wiki/Impedance_of_free_space That provides a way to determine the value of the universal constant c. >Sue... > > Henry Wilson... ........Einstein's Relativity...The religion that worships negative space. |