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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Spacetime or a vacuum can never be totally empty.
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<blockquote data-quote="sjastro" data-source="post: 76688267" data-attributes="member: 352921"><p>If you are trying to convince me your post is an adequate summary of the Fermilab link I’m afraid not.</p><p>Here is your post again for reference.</p><p></p><p></p><p>What the Fermilab article is describing is space-time filled with an electromagnetic field that has a zero point energy which describes the energy of the vacuum.</p><p>The presence of the quantum foam is scale dependent on the Planck length, not observable at macro scales, and has nothing to do probabilities.</p><p>It’s like individual atoms being unobservable at macro scales.</p><p></p><p>The energy of the vacuum is the expectation or mean value.</p><p>Deviations from this expectation value or vacuum fluctuations produce the virtual particle/antiparticle pairs which pop in and out of existence according to the energy-time relationship of the Heisenberg uncertainty principle ΔE.Δt ≥ h/4ϖ</p><p>It is the energy of these particle/antiparticle pairs the article is referring to.</p><p></p><p>It is impossible to directly probe the Planck scale for evidence of quantum foam but physicists have been able to see the indirect effects of the quantum foam <u>at macro scales</u> as described in the article on the Casimir experiment.</p></blockquote><p></p>
[QUOTE="sjastro, post: 76688267, member: 352921"] If you are trying to convince me your post is an adequate summary of the Fermilab link I’m afraid not. Here is your post again for reference. What the Fermilab article is describing is space-time filled with an electromagnetic field that has a zero point energy which describes the energy of the vacuum. The presence of the quantum foam is scale dependent on the Planck length, not observable at macro scales, and has nothing to do probabilities. It’s like individual atoms being unobservable at macro scales. The energy of the vacuum is the expectation or mean value. Deviations from this expectation value or vacuum fluctuations produce the virtual particle/antiparticle pairs which pop in and out of existence according to the energy-time relationship of the Heisenberg uncertainty principle ΔE.Δt ≥ h/4ϖ It is the energy of these particle/antiparticle pairs the article is referring to. It is impossible to directly probe the Planck scale for evidence of quantum foam but physicists have been able to see the indirect effects of the quantum foam [U]at macro scales[/U] as described in the article on the Casimir experiment. [/QUOTE]
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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Spacetime or a vacuum can never be totally empty.
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