bhobba's latest activity
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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.
Nope, there is only one, unique maximum elevation angle in 3D geometry, namely ##\theta_{\bot}\,##, just like there's only one ##c##... -
bhobba reacted to renormalize's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
It's because ##c## is an inherent fixed characteristic of the geometry of 4D Minkowski spacetime. Consider this 3D spatial analogy: you...
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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.
Fair enough.
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bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.My goof - wrong paper. Now fixed. The correct paper (by @Demystifier who often posts here) is...
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bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.Many constants in physics are known to exist, but their values must be determined experimentally. The constant c in the Lorentz...
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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.
What do you think? Can a true “physical property of the vacuum” be something that doesn’t even exist in some units? Can a true “physical...
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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.
Note that their calculations all assume SI units and SI equations. So it is not merely “vacuum fluctuations” -> “vacuum permittivity”...
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bhobba replied to the thread High School What Medium Does Light Travel Through in Space?.In the classical limit, you get Maxwell's equations that imply c is the invariant speed of light. Thanks Bill
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bhobba reacted to Sagittarius A-Star's post in the thread High School What Medium Does Light Travel Through in Space? with Like.
In SR the invariant speed is finite. The value of ##c## is defined by the SI definition of "1 meter"...
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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 am not sure why you would want to reinsert physical constants. But if you wished to do so then yes that is correct. It is not...
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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
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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...
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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...