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Let's say I have some Lorentz-violating theory. For concreteness we could imagine a scalar fieldbegin{equation}S=int {rm d}^4 x left(-frac{1}{2} (partial phi)^2 + V(x)^mu partial_mu phiright)end{equation}where...
Asked on 09/01/2020
2 answerI was learning about spherical abberation and in my book it is written that when parallel rays pass through lens marginal rays (which are far from principal axis) are bent...
Asked on 09/01/2020 by gurdeep singh
2 answerIn chapter 6 of volume 1 of the Feynman lectures on physics, Feynman's elaborates on the random walk. https://www.feynmanlectures.caltech.edu/I_06.html Amidst his lecture, he says this: The expected...
Asked on 09/01/2020 by Benjamin Sauvé
0 answerSorry if this question is too elementary, as is my level, but I'm wondering how close two supermassive black holes can get and should the Keplerian rotational frequency at that...
Asked on 09/01/2020 by Bardhyl
0 answerIf we lift an object of mass $m$ from the ground at $z=0$ to height $z=h$ without acceleration, the lifting force must equal and opposite to the...
Asked on 09/01/2020
2 answerQuestionAre the coordinate transformation properties of the wave-function in the Heisenberg picture simply: $$ psi(x_1,x_2,x_3) to psi( x'_1,x'_2,x'_3)$$ where the coordinates $(x_1,x_2,x_3)$ and $( x'_1,x'_2,x'_3)$ are related...
Asked on 09/01/2020 by More Anonymous
0 answerIf a body is rolling without slipping is it necessary that there is friction acting on it ? I encountered a question in which there is a spherical body and...
Asked on 08/31/2020 by Laboni Gautam
3 answerActually I have two questions.we know the efficiency of heat engine equal {1-(t/T)},where t is sink temperature and T is...
Asked on 08/31/2020 by john.David
1 answerHow can two particles be drawn together by exchanging other (force carrier) particles. Both reactive components of exchange and absorption logically seem to support repulsion. How are these particle exchanges...
Asked on 08/31/2020 by RaSullivan
1 answerI want to compute the redshift of a signal emitted by a static observer in $r=R_1$, $phi=phi_1$and recieved by another static observ at $r=R_2$, $phi=phi_2$ with...
Asked on 08/31/2020 by Pancio
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