Wang / Sagnac Devices
in [Relativity]
|
Prev: Relativity ring problem - what shape is this?
Next: BUY CHEAP TEXTBOOKS | College Textbooks | Used Textbooks |
From: Androcles on 23 Oct 2009 22:11 "Henry Wilson DSc ." <HW@..> wrote in message news:tn64e5drp3n25o8vqeinu1khteba32d8u2(a)4ax.com... > Tom seems to believe that the path lengths can be made the same simply by > changing the viewing frame. He should know better. > Wilson seems to believe that the path length from Sydney to London and the path length from the back of the plane to the flight deck cannot be made the same simply by changing his seat on the plane to a seat in the departure lounge. If he ever walked the path length from London to Sydney at the same time as he walked the path length of a plane then he'd know better, but fortunately the old goat is already in Oz selling used VW camper vans.
From: Jonah Thomas on 23 Oct 2009 22:46 Tom Roberts <tjroberts137(a)sbcglobal.net> wrote: > Jonah Thomas wrote: > > Light travels through a fiber optic cable [...] > > This is done all the time. Look up fiber optic gyroscope. Do they commonly use pulses of light so short that the light from one direction has ended before the light from the other direction arrives? > The results confirm the prediction of SR. > > The results refute any ballistic theory. [sigh] It concerns me that for some 70 years before we had fiber optic cables to do the experiment, many people claimed that Sagnac refuted any ballistic theory, when they did not. That's a very bad track record. Now we have methods which might actually refute ballistic theories, and you people are still claiming that they are already refuted. > The results limit the form of an aether theory; when combined with all > > the other experiments, no classical aether theory remains viable. That seems plausible to me. If an aether gives a single frame where light sources create circular concentric light waves, but a light source at rest in any other frame creates eccentric circles or ellipses, that ought to be testable. Aether theories which get around that problem will probably also be emission theories or SR variants.
From: doug on 24 Oct 2009 00:08 Jonah Thomas wrote: > Tom Roberts <tjroberts137(a)sbcglobal.net> wrote: > >>Jonah Thomas wrote: > > >>>Light travels through a fiber optic cable [...] >> >>This is done all the time. Look up fiber optic gyroscope. > > > Do they commonly use pulses of light so short that the light from one > direction has ended before the light from the other direction arrives? > That certainly is very easy to do. > >>The results confirm the prediction of SR. >> >>The results refute any ballistic theory. > > > [sigh] It concerns me that for some 70 years before we had fiber optic > cables to do the experiment, many people claimed that Sagnac refuted any > ballistic theory, when they did not. Well, your ignorance is not a problem with science. That's a very bad track record. Yes, your track record is pretty bad. It started when you wanted to change the laws of physics to suit your math mistakes. Now > we have methods which might actually refute ballistic theories, and you > people are still claiming that they are already refuted. Because they have been. > > >>The results limit the form of an aether theory; when combined with all >> >>the other experiments, no classical aether theory remains viable. > > > That seems plausible to me. If an aether gives a single frame where > light sources create circular concentric light waves, but a light source > at rest in any other frame creates eccentric circles or ellipses, that > ought to be testable. > > Aether theories which get around that problem will probably also be > emission theories or SR variants. Do you realize what you are saying?
From: Androcles on 24 Oct 2009 06:02 "Henry Wilson DSc ." <HW@..> wrote in message news:c0h5e59ulitdihhrv7djb52jgcuol370da(a)4ax.com... > On Sat, 24 Oct 2009 03:11:47 +0100, "Androcles" > <Headmaster(a)Hogwarts.physics_p> > wrote: > >> >>"Henry Wilson DSc ." <HW@..> wrote in message >>news:tn64e5drp3n25o8vqeinu1khteba32d8u2(a)4ax.com... >> >>> Tom seems to believe that the path lengths can be made the same simply >>> by >>> changing the viewing frame. He should know better. >>> >> >>Wilson seems to believe that the path length from Sydney to London >>and the path length from the back of the plane to the flight deck >>cannot be made the same simply by changing his seat on the plane >>to a seat in the departure lounge. If he ever walked the path length >>from London to Sydney at the same time as he walked the path >>length of a plane then he'd know better, but fortunately the old goat >>is already in Oz selling used VW camper vans. > > I know you are a secret relativist. > > A metre rod is the same length no matter how or where you take it. A metre rod is not a path length. Path lengths can be made the same simply by changing the viewing frame.
From: Jonah Thomas on 24 Oct 2009 07:41
HW@..(Henry Wilson DSc). wrote: > Actually, this experiment would not be very difficult. > You simply wind two long glass fibres around a former in opposite > directions with their ends poking out together. Then you spin the > thing at very high speed. Set up a light so that every time the ends > pass it, a pulse goes down each one in opposite directions. No! attach a laser cavity that produces light in two opposited directions to the fibers, and have it spin with them. Otherwise, which emission theories would predict a difference in lightspeed? |