Ben Crowell
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 May 28 awarded Popular Question May 21 comment Why Negative Energy States are Bad This is total nonsense. The definitions proposed here are not even viable definitions, because they don't handle the zero-mass case. The relativistic relation that works for all masses, including zero mass, is $m^2=E^2-p^2$, which is perfectly compatible with $E<0$. If this elementary classical argument had been correct, then it would have been a schoolboy mistake for Dirac to propose his picture of the Dirac sea. May 13 awarded Popular Question May 8 awarded Taxonomist Apr 12 awarded Necromancer Mar 29 awarded Nice Answer Mar 6 awarded Nice Answer Mar 1 awarded Necromancer Feb 28 awarded Nice Answer Feb 25 awarded Necromancer Feb 14 awarded Popular Question Feb 11 comment How come some people are claiming that the Big Bang never happened? This doesn't address the question. Feb 9 awarded Good Answer Feb 6 awarded Necromancer Jan 30 awarded Necromancer Jan 29 awarded Necromancer Jan 24 awarded general-relativity Jan 8 awarded Necromancer Jan 2 comment Energy Required to Rip Spacetime It sounds like you're referring to topology change. The classic paper on this topic is by Geroch, adsabs.harvard.edu/abs/1967JMP.....8..782G . Here is a more recent discussion: arxiv.org/abs/gr-qc/9406053 . Geroch showed that there must be either CTCs or a violation of the weak energy condition. Dec 29 comment Why are electromagnetic waves not able to pass through a hole with a diameter smaller than the wavelength? But if they are close together...closer than the wavelength of the radiation...then they represent two coherent sources whose amplitudes add. So you get FOUR times the power. Diameter-to-the-fourth. (Because it doesn't matter if the two holes are merged into one.) Two mistakes here. (1) Two holes side by side do not constitute a hole with twice the diameter. (2) If power goes like the fourth power of the diameter, and you double the diameter, then you get 16 times the power, not four times. For a correct explanation of the exponent, see the questions that this question duplicates.