Nugatory's latest activity
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Nugatory reacted to SergejMaterov's post in the thread I Would gravitons theoretically act like photons? with
Like.
Gravity’s coupling G is dimensionful, so you only get a meaningful gravitational fine‑structure constant once you specify masses or... -
Nugatory replied to the thread I Freefall and gravity.Proper acceleration is measured with an accelerometer. Imagine a cubical box with six springs inside; one end of each spring is...
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Nugatory replied to the thread I Freefall and gravity.Objects "experiencing gravity", whether in freefall or not, is not part of the theory of general relativity; it's a misunderstanding...
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Nugatory replied to the thread I Hydrogen 21 cm line time?.No. I am sorry to say that it is complete nonsense. The Bohr was abandoned long ago because it does not adequately describe electrons...
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Nugatory replied to the thread I Hydrogen 21 cm line time?.What do you mean by "the hydrogen cloud"? But no matter what you mean by that, it makes no sense to talk about the speed of a bound...
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Nugatory replied to the thread I Shwartzschild coordinate system.It cannot be done, for about the same reason that we cannot find a transformation between latitude and longitude on the curved surface...
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Nugatory replied to the thread B What is the Correct Reading on the Scale in This Mass/Scale Puzzle?.It doesn't. Several posts have already done that: Demystifier's #71, multiple posts from multiple people suggesting that you draw a...
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Nugatory replied to the thread Vector/Phasor Addition.I'm not seeing what you're trying to do here. What are these ##X_i## quantities and where did they come from in your example?
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Nugatory reacted to PeterDonis's post in the thread I Does Time-Symmetry Imply Retrocausality? How does the Quantum World Say “Maybe”? with Like.
We already know Nature violates some premise of the Bell proof, because Nature violates the Bell inequalities.
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Nugatory replied to the thread I Wigner's friend and quantum tunneling.But it can, as long as the wave function has non-zero amplitude outside the box. Two consecutive position measurements will in general...
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Nugatory replied to the thread B What is the Correct Reading on the Scale in This Mass/Scale Puzzle?.I agree, but I find that the free body diagram of the two components of the scale (hook attached to the pointer, case) is how to do that.
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Nugatory replied to the thread I Shape of wave function (probability distribution) of a single photon.It isn't. We explain the double-slit experiment with light by doing a classical calculation of classical electromagnetic waves passing...
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Nugatory replied to the thread B What is the Correct Reading on the Scale in This Mass/Scale Puzzle?.You can try a free body diagram that includes as separate components the hook on the scale and the case of the scale. The hook is...
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Nugatory replied to the thread I Shape of wave function (probability distribution) of a single photon.You could, and then you would indeed get a wave function as an answer. If the process creating the electron allows the electron to be...
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Nugatory reacted to div_grad's post in the thread I Phase and group velocity for the wave function with Like.
@hokhani Note that this issue of group velocity of a wave packet can be equally well formulated in, e.g., classical electromagnetism...