Dale's latest activity
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Dale replied to the thread High School Can anyone understand relativity.I think it is somewhere in between. Not anyone can understand it, but a whole lot of people do. It does take effort. -
No, they don't: Please don't post contradictory statements. Also, nonzero neutrino masses do not "suggest" that they do not travel at...
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Dale replied to the thread Graduate Does a Particle's Identity Have a Physical Cost?.You are unambiguously proposing a new theory. We do not evaluate new theories. However, in addition to this being a new theory, your...
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Dale reacted to Physics Fundamental's post in the thread Undergrad Are the basic axioms of thermodynamics demonstrated experimentally? with
Like.
Yes, although I would make an important distinction between “demonstrated experimentally” and “proven experimentally.” The basic laws... -
Dale reacted to PeterDonis's post in the thread Graduate Is photon frequency intrinsic or observer-dependent? with Like.
No. The geodesic is a worldline. The 4-momentum is a 4-vector ##k^\mu## that is tangent to that worldline. And... No, this is not...
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Dale replied to the thread Graduate Is photon frequency intrinsic or observer-dependent?.For a radio wave and a gamma ray propagating in the same spatial direction, the ##k^\mu## vectors are pointing in the same direction in...
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Dale reacted to Nugatory's post in the thread Graduate Is photon frequency intrinsic or observer-dependent? with Like.
That's similar to saying that two bullets moving relative to one another will have different kinetic energies in different frames...
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Dale reacted to Sagittarius A-Star's post in the thread Graduate Is photon frequency intrinsic or observer-dependent? with Like.
Yes, because it is massless.
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Dale reacted to QuarkyMeson's post in the thread Graduate Time evolution of a detected particle with Like.
An exact position eigenstate is a generalized, non-normalizable state; i.e., not a physically preparable one. Its divergent momentum...
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There's a degree of flexibility in how you define distance in a non-stationary spacetime like those containing gravitational waves. You...
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Dale replied to the thread Graduate Is photon frequency intrinsic or observer-dependent?.Nothing.
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Dale reacted to Ibix's post in the thread Undergrad Homogeneity of space and time in Landau & Lifshitz with Like.
Homogeneity of space means invariance under purely spatial translations. Thus if you have two events whose coordinates are ##x_a##...
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Dale reacted to Mike_bb's post in the thread Undergrad Homogeneity of space and time in Landau & Lifshitz with Like.
Landau & Lifshitz' Classical Theory of Fields (pp.14-15)
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Dale replied to the thread Undergrad Why the initial choice matters in the Monty Hall problem.Oops, sorry I missed this earlier. This is a Bayesian updating approach. I used a uniform prior which is a conjugate prior. So after...
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Dale reacted to aletheia's post in the thread Undergrad Single-photon double-slit with multiple apparatus? with Like.
You’re right. Actually, you are all right. I did my study, applied my reasoning and understood why the idea was wrong. Thanks.