Nugatory's latest activity
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Nugatory replied to the thread I How strong is the justification for low probability extreme thermal fluctuations?.You have not thought through the implications of the question in post #16 of your other thread. Say that we set this random number... -
Nugatory replied to the thread B Is a table levitating possible, even at a minuscule probability?.The way to get a levitating table is through classical physics: just by random chance a substantial fraction of the air molecules under...
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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}##...
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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...