Belorg, I respond to your post 570.
Originally Posted by robbodb
Belorg.
Quote
“Is this “possibility” of an abstract nature or one that can be tested and/or observed?
That virtual particles come into existence is testable.The Casimir effect is a well-known phenomenon.
Of course that does not prove that it wasn’t some unknownand undetectable entity that ‘created’ those VP’s. But it most certainly shows that the notion that things must be moved by something else is not certain, whihc renders the Argument from Motion just another God- of -the- gaps- argument” End quote.
Belorg , seems we get another red herring from you as this post demonstrates. Of course “particles come into existence” You implicitly posit that the Casimer Effect demonstrates that particles come into existence from nowhere or that particles can pop out of nothing. Your statement is misleading and distorting to say the least.
The Casimer Effect experiments do no such thing. Putting it another way is to say that particles exist in a vacuum and have been seen to appear and then disappear. The time span which they are visible before they reappear varies.
If you have evidence (not opinions please) which is contrary to the content of the articles herein please provide it.
Incidentally I refer you to my previous post 534 part of which is immediately below on this issue which debunks the assertion of particles popping out of nothing.
"The following article debunks the whole concept.
lynnemctaggart.com/blog/1…out-of-nothing "
Belorg, If you disagree with the author of the article above please specify where giving solid reasons so we can reconsider.
Following are articles/comments on your post 570
Refer article in following link.
casimir-network.fr/IMG/pdf/Casimir_20effect.pdf
Extract follows:
"The Casimir effect: a force from nothing
Astrid Lambrecht
1 The Casimir forceIt was the Dutch theoretical physicist Hendrik Casimir (1909–2000) who first realized that when two mirrors face each other in a vacuum, fluctuations in the vacuum exert “radiation pressure” on them. On average the external pressure (red arrows) is greater than the internal pressure (green arrows). Both mirrors are mutually attracted to each other by what is termed the Casimir force. The force F ~ A/d 4, where A is the area of the mirrors and d is the distance between them.
Understanding the Casimir force
Although the Casimir force seems completely, it is actually well understood. In the old days of classical mechanics the idea of a vacuum was simple. The vacuum was what remained if you emptied a container of all its particles and lowered the temperature down to absolute zero. The arrival of quantum mechanics however
completely changed our notion of a vacuum. All fields – in particular elec- tromagnetic fields – have fluctuations. In other words at any given moment their actual value varies around a con- stant, mean value. Even a perfect vacuum at absolute zero has fluctuating fields known as “vacuum fluctuations”, the mean energy of which corresponds to half the energy of a photon.
However, vacuum fluctuations are not some abstraction of a physicist’s mind. They have observable consequences that can be directly visualized in experiments on a microscopic scale. For example, an atom in an excited state will not remain there infinitely long, but will return to its ground state by spontaneously emitting a photon. This phenomenon is a consequence of vacuum fluctuations."
Refer article in following link.
sciencedaily.com/releases/2011/11/111118133050.htm
Extract follows:
"Light Created from a Vacuum: Casimir Effect Observed in Superconducting Circuit
The results have been published in the journal Nature.
The experiment is based on one of the most counterintuitive, yet, one of the most important principles in quantum mechanics: that vacuum is by no means empty nothingness. In fact, the vacuum is full of various particles that are continuously fluctuating in and out of existence. They appear, exist for a brief moment and then disappear again. Since their existence is so fleeting, they are usually referred to as virtual particles.
What happens during the experiment is that the “mirror” transfers some of its kinetic energy to virtual photons, which helps them to materialise. According to quantum mechanics, there are many different types of virtual particles in vacuum, as mentioned earlier. Göran Johansson, Associate Professor of Theoretical Physics, explains that the reason why photons appear in the experiment is that they lack mass.
“Relatively little energy is therefore required in order to excite them out of their virtual state. In principle, one could also create other particles from vacuum, such as electrons or protons, but that would require a lot more energy.”
The scientists find the photons that appear in pairs in the experiment interesting to study in closer detail. They can perhaps be of use in the research field of quantum information, which includes the development of quantum computers.
However, the main value of the experiment is that it increases our understanding of basic physical concepts, such as vacuum fluctuations – the constant appearance and disappearance of virtual particles in vacuum. It is believed that vacuum fluctuations may have a connection with “dark energy” which drives the accelerated expansion of the universe."
refer article in following link:
economist.com/node/11402849
Extract follows:
"The Casimir effect
The Casimir effect, a curious consequence of quantum theory, may yet have practical applications
Much ado about nothing"