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First, there should be a redshift due to the velocity of the object before it crosses the horizon. And then, does the object's light just shut off? Note: There are...
Asked on 01/22/2021 by Maj
1 answerTopologically speaking, our universe is either open (topologically $E^3$) or closed (topologically $S^3$). Then with time we'd have another factor of $E^1$ and a metric connection would...
Asked on 01/22/2021
1 answerI am new to QM and have a question regarding bra-ket notation and dual vectors. I have a vector $|Psirangle = |arangle + k|brangle$, where $k$ is some...
Asked on 01/22/2021 by Wheels
1 answerSuppose $A$ is a positive definite $dtimes d$ matrix and $T$ is a positive map over such matrices defined as follows $$T(X)=AX+XA$$ I'm wondering if if...
Asked on 01/22/2021
1 answerWith the function $R{ e }^{ frac { i }{ hbar } S }$ one can separate the Schrödinger equation$$i hbar frac{partial psi}{partial t}=left(-frac{hbar^{2}}{2 m} nabla^{2}+Vright)...
Asked on 01/22/2021 by NicAG
1 answerWhy do the principles of physics get more complex when the frame of reference undergoes acceleration?...
Asked on 01/22/2021
4 answerI have read there is renewed interest in intensity interferometry in astronomy. I read that intensity interferometry is immune to atmospheric turbulence, which plagues astronomy and regular (amplitude) interferometry. I...
Asked on 01/22/2021
2 answerI have one-dimensional harmonic move, but velocity is defined as function of distance from the beginning V(x) = (Vmax + Vmin)/2 + (Vmax - Vmin)/2 * cos((2 * PI /...
Asked on 01/22/2021 by Michal Steller
1 answerI'm struggling to understand the commutator theory for quantum mechanics. I know there's the proof to do with $[P,Q]=0$ therefore there is a set of simultaneous eigenstates for ...
Asked on 01/22/2021 by physconomic
1 answerI am studying statistical mechanics and I saw the following statement in my notes: $$frac{drho}{rho} = frac{e^{-beta p^2/2m}}{(2pi m k_B T)^{3/2}} 4pi p^2 dp quad ldots (1)$$ where ...
Asked on 01/22/2021
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