swansont

Done

If it's fact, then it must be observed to be true. Better still if it's predicted by existing theory. But since movement cannot be stopped, how could this ever be observed? If we do this abstractly, by transforming into a reference frame where there is no motion, we see that time runs at its fastest — that motion causes time to run slower. So how is it that you present this as fact?

You posted this in relativity. If you are proposing some alternate interpretation, I'll move this to speculations.

Ummm … (emphasis added) So, you most certainly did state that gravity could be responsible. That's not what the quotes say, and that's not what the theory says. You are seriously confused of you think otherwise. Yes, it's a cadre of monkeys typing on keyboards that keep posting to speculations.

Yep, it works now. Thanks for showing them who's boss.

Can't really help you with that. NowThatWeKnow has given one example of experimental evidence that continually confirms that relativity is true, and there are many others.

with or without mirrors means this it's present everywhere. No mirrors = no Casimir effect, and yet they confirm that the vacuum energy is infinite. That's why it's a very interesting conundrum: the exclusion of some of the vacuum energy causes an observable effect, and yet the infinite value of it does not cause infinite curvature in GR. However, what is does NOT say, or even imply, is that gravity is the cause of the Casimir effect. Nothing you have quoted implies that gravity is responsible. Your insistence that it is is why this has been put in Speculations. If you can provide any support that gravity is responsible, do so. Otherwise, the thread will be closed.

Getting an error when I try and upload a picture "Unable to create directory /www/blogs.scienceforums.net/html/wp-content/blogs.dir/21/files//2009/02. Is its parent directory writable by the server?"

Yes. A Laser is a resonant cavity with a lossy window and a gain medium, as I mentioned earlier. A resonant cavity means you get waves of a particular phase, and the gain medium gives amplification by stimulated emission.

Their clocks don't run at the same rate, since they are in different reference frames. Time goes slower for the twin that makes the trip.

The infinity in the vacuum energy is present everywhere. It's an issue in reconciling all of QM with GR. It is not specific to the Casimir effect.

Discussion of how this might tie in with gravity moved here

You can build a resonant cavity with a lossy window. Microwave amplification systems (masers) were built before lasers were; the issue with radio waves is that the cavity needs to be larger (i.e. meters instead of centimeters) and you need a gain medium that emits in the RF. You can also get directionality with your system by using a parabolic dish as an antenna.

Because diffraction is the source of the interference. You can do interference in many ways, but in e.g. a Michelson or Mach-Zehnder interferometer, you split the beam up and recombine it.

Oh, let's not say that. Let's restrict ourselves to scientific reality. When the photons interact, energy is transferred to the surrounding atoms. There is no way they can just re-appear; energy is conserved. e.g. a high-energy gamma that gets converted to an electron positron pair will not — cannot — reappear. You will get annihilation photons of a lower energy. Energy is not stored in the charge of the nucleus. That's nonsense. I think you mean excited, but how does this tie in with someone getting fired? And which of these are used as shielding? Your most likely element from that list is Fe, but Fe-55 isn't stable. Most iron is Fe-56, and Fe-57 and -58 are both stable; this suggests they have nonzero neutron capture cross-sections.

Yes http://sciencelinks.jp/j-east/article/200314/000020031403A0470732.php We have investigated the two-photon diffraction-interference of entangled photon pairs generated by optical parametric down-conversion.

This is science. One must be constrained by the reality we observe and measure.

There's nothing in those excerpts which implies that gravity is in any way responsible for the Casimir force. Also, your sciam link leads me to a "page not found"

You can measure it in a Penning trap http://en.wikipedia.org/wiki/Penning_trap#How_it_works You use rest as the common reference because any other measurement will depend on your choice of reference frame. But the rest mass is invariant, so the value will be the same in any inertial frame.

You haven't rigorously defined by what you mean by "now" and "progression of nows." Until you do, there's no point in trying to have a discussion. In physics we already have defined what is meant by time and time interval. "Now" isn't defined, (partly) because "now" isn't quantifiable. ——— If I am interpreting your OP properly (and from the thread I linked to), you appear to be saying this: we have two observers (the twins) whose history has offset their clocks but are now co-located. One twin (A) sees an event, and notes that his clock says it's noon. The other twin (B), whose clock had previously run slow due to his travels, thinks it's 6:00. You appear to be claiming that the second twin won't observed the event for another six hours — that somehow B is living in A's past, and they have to experience events according to A's clock. But this in not how the universe behaves. Because the speed of light is constant in all frames of reference, time is not absolute. The twins both observe the effect simultaneously. They disagree on what time it is. There is no such thing as absolute time. The rate at which time passes depends on the frame of reference of the observer.

If you were able to engineer electronics to turn it on and off that fast, you might be able to engineer a detector that has that response bandwidth. If you modulate a signal at f, you will get a response at f on your detector, so your detector has to be capable of responding to that modulation.

The Casimir effect is adequately explained by QED. There is no basis for thinking that gravity is responsible.

Wave generation can also be from lateral movement in the water. This is how the waves are made in amusement-park wave pools.

That's just it — it's a tautology. It's always now. As such, "now" adds no information to the discussion. There's no physics in it. And we've been over this ground before

But they will not be simultaneous at all points in all reference frames.