Nugatory's latest activity
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Nugatory replied to the thread I Commutation of operators for particle in a box.Take ##\psi(x)## to be an arbitrary function and expand the commutator. You will end up with a term proportional to ##\frac{dV}{dx}##... -
Nugatory reacted to dextercioby's post in the thread I Commutation of operators for particle in a box with
Like.
Finite walls or infinite walls? Start down by writing the Hilbert space, then the two operators. You may discover that the commutator is... -
Nugatory replied to the thread I Commutation of operators for particle in a box.Does it? We have ##[H,P]=[P^2/2m,P]+[V(x),P]##; the first term is trivially zero but there’s no reason to expect the second one to be...
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Nugatory replied to the thread B What qualities does time have other than linearity, motion, and speed?.There's no sensible answer to your question until you have defined what you mean by the word "time". This being a physics forum where we...
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Nugatory replied to the thread I Quantum Entanglement and Synchronization.No. There is no way of distinguishing a so-called collapsed state from an uncollapsed state (the “so-called” is there because even...
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Nugatory reacted to pervect's post in the thread I Confused about time dilation -- motion vs energy with Like.
As others have pointed out, it's a bit more complicated than that. I'm guessing that you are assuming there is some state of "absolute...
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Nugatory replied to the thread I Confused about time dilation -- motion vs energy.It cannot, because time dilation is independent of the energies and momenta involved. This is to be expected because time dilation is...
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Nugatory replied to the thread I Quantum behaviour of an electron around a positively charged sphere.That's not a "serious" error, a serious error is something like flying a perfectly good airplane into a mountain because you thought...
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Nugatory replied to the thread I Confused about time dilation -- motion vs energy.That is not what time dilation means. Consider that right now you are moving at that speed relative to a cosmic ray particle wandering...
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I think @Nugatory's post actually highlights the contradiction in the OP's thinking quite nicely. We start with a black hole of mass...
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Nugatory replied to the thread B How can a black hole absorb matter?.There is, and the “similar threads” section below will take you to some of the older threads about this. An excerpt from one of them...
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Nugatory reacted to JimWhoKnew's post in the thread I Visual depiction of atomic orbitals with Like.
##Y^m_l## is a function of two variables that has complex values on a sphere. Following @WernerQH in post #6, ##p_z## is described by...
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Nugatory reacted to Ibix's post in the thread I Please explain how length contraction and time dilation result in a constant c with Like.
As a general point, when starting out with relativity I'd advise you to forget about length contraction and time dilation. They are...
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Nugatory replied to the thread I Please explain how length contraction and time dilation result in a constant c.You might want to look at the relativistic velocity addition formula, which combines the effects of relativity of simultaneity, length...
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Nugatory reacted to Ibix's post in the thread I Can this experiment break Lorentz symmetry? with Like.
But you are still using Newtonian formulae, which means you accept the principle of relativity. So you are not testing the principle of...