bhobba's latest activity
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bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.The Casimir Effect is related to Van der Waals forces: http://thphys.irb.hr/wiki/main/images/2/2c/Casimir.pdf Thanks Bill -
bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.The point was simply that it's not a medium like, say, water is in water waves seen in the everyday world. What is it (advanced...
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bhobba reacted to renormalize's post in the thread High School What Medium Does Light Travel Through in Space? with
Like.
Nothing! It's a postulate (but well-founded on empirical evidence!) that our (local) universe is a 4D Minkowski spacetime with an... -
bhobba reacted to weirdoguy's post in the thread Undergrad Particle vs Wave Interpretations of QM with Like.
Again, energy is one of many of particles properties! As others have said, it does not work the way you think, but even if it did, those...
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bhobba reacted to PeterDonis's post in the thread Undergrad Particle vs Wave Interpretations of QM with Like.
A creation operator does not represent an actual physical process. (It's not even an observable since it has no eigenstates.) It's a...
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bhobba reacted to Matterwave's post in the thread Graduate My questions about QFT and the standard model with Like.
This is a very long question which covers quite a bit of the QFT machinery. It might be more productive to focus on one specific...
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bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.The whole issue of virtual particles and vacuum fluctuations being real is complicated, with many experts (including me, not that I am...
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bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.There is what is called the quantum EM field that permeates all space. Heuristically (i.e., not true but adds some intuition), a photon...
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bhobba reacted to Dale's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
I disagree with many claims in any MDPI journal. They are, in my opinion, a predatory publisher with unethical practices. If you wish...
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bhobba reacted to Dale's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
Those are just artifacts of the SI units. They are not part of nature. They don’t even exist in some other unit systems. Space is...
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bhobba reacted to Orodruin's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
This is a faulty assumption and you would do well to get rid of it.
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bhobba reacted to PeroK's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
Empty space is a vacuum. Interstellar and intergalactic space are almost empty, but not quite.
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bhobba reacted to Ibix's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
They don't. Discovering that there's no evidence of a medium was a large part of the work that led to relativity theory.
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bhobba reacted to PeterDonis's post in the thread Undergrad Are classical optics and quantum mechanics double slit experiments fundamentally the same? with Like.
Moderator's note: Two posts discussing a paper on "dark photons" have been deleted. It's not clear that that paper is even a valid...
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bhobba replied to the thread Undergrad Are classical optics and quantum mechanics double slit experiments fundamentally the same?.For what photons are, not the POP scIence version, see the following I frequently post...