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Given that $hat{r} psi = rpsi$ where $r$ is the position of a quantum particle, and where $hat{p}=-ihbar nabla$, the notes I have simply state that ...
Asked on 02/03/2021
0 answerI surprisingly did not find anyone addressing this directly.The weak cosmic censorship states, very loosely that singularities imply event horizons. I am wondering whether the converse is true.I.e....
Asked on 02/03/2021
3 answerI am confused that whether the positive terminal in physics refers just to a higher potential or a positive charge. This also comes from the fact that anode and cathode...
Asked on 02/03/2021 by Yash Sinhal
2 answerQuestion. In my textbook, gravitational potential is defined as the amount of work done per unit mass to move an object from an infinite distance to that point in the...
Asked on 02/03/2021 by IncredibleSimon
1 answerI just had to teach something that I myself have never learned, concerning recessional velocity of galaxies. Awkward! The question was: "A line in a hydrogen spectrum has a wavelength...
Asked on 02/03/2021 by thetada
1 answerWhen a light microscope is used in the reflected mode there is a semi-transparent mirror angled at 45 degrees that reflects a portion of the light onto the sample. The...
Asked on 02/03/2021
2 answerAs far as I know, in QFT it is very hard to make sense of a position operator. In fact, there is one thread on this matter here: "Position...
Asked on 02/03/2021
0 answerI would like to build a Schlieren photography system with a single mirror setup*. My question is - what type of mirror (parabolic/spherical) is good or at least feasible for...
Asked on 02/03/2021 by zegkljan
1 answerIt is often said one of the benefits of the path integral, $$int Dphi ; e^{iS[phi]}$$ is that it is manifestly Lorentz covariant if $S[phi]$ is Lorentz covariant....
Asked on 02/03/2021
1 answerI am trying to conduct an experiment on the melt time time of two ice cubes with a different salt concentration, one with none and one with a lot. Does...
Asked on 02/03/2021 by Charlotte Gleeson
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