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Apr
21
answered Is it possible to derive the angular frequency of a simple harmonic oscillator using total energy?
Apr
18
answered Electric field due to a uniformly charged FINITE rectangular plate
Apr
17
comment Why is the singularity of the Big Bang not considered to be the center of the Universe?
possible duplicate of Did the Big Bang happen at a point?
Apr
14
awarded  Organizer
Apr
14
revised Computing the probability density of wavefunctions
edited tags
Apr
14
comment Computing the probability density of wavefunctions
Finding the probability density of the eigenstates isn't really something that makes sense, so it's no wonder you don't know how to do it. Are you sure that's what you have to do?
Apr
14
reviewed Approve What is the difference between zero background radiation and field background radiation in Nuclear Physics measurements?
Apr
11
comment a glaring deficiency in the QFT lagrangian formalism
That's true, but I'm not sure what the question is. Also don't forget that there are classical fields too: You need boundary conditions for the Maxwell and Einstein equations (and any other classical field equation).
Apr
11
comment a glaring deficiency in the QFT lagrangian formalism
I'm not exactly sure what you're asking, but it seems that it worries you that there are many solutions to the KG equation. Well, there are many solutions to the classical particle Lagrangian too, until you add initial conditions. And you want to use the KG equation to find the movement of a test particle, but it is a field equation.
Apr
11
comment I were to travel to the other side of the world then is this logic possible? If no, why?
Of course that's possible. But how would you manage to become stationary?
Apr
10
comment What does it mean to “contract” a tensor identity?
That's not contracting, that's just renaming the indices.
Apr
9
comment Are there any scales other than temperature that have different zero points?
I don't think this answers the question. Temperature is scale in which changing the scale forces you to change the zero point. The zero point and the unit of time are independent; if I was measuring time in seconds and I want to change it to minutes, I don't shift $t=0$, I just divide everything by $60$.
Apr
7
comment Why is there a contradiction in this Newton's equations of motion related question?
Do you know what $u$ is? Why do you think it's zero?
Mar
31
comment Condition on $U_{eff}$ for a mass to get trapped in orbit around a heavier mass
As far as I can tell, Wikipedia is indeed wrong. What the correct condition actually is depends on the particular problem (for some potentials there may not be bounded orbits). For gravity, it's $E<0$.
Mar
27
comment Is the lay explanation of the equivalence principle wrong?
Also, I remember reading that a clock on an accelerating spaceship will run at different speeds when placed at different heights, which is consistent with the equivalence principle.
Mar
23
comment Do some of the laws of Thermodynamics break down in Quantum Mechanics?
This is just me, but I interpreted the question as being about whether thermodynamics is applicable at the microscopic level, not whether there are quantum effects in macroscopic thermodynamics. But maybe OP will correct me.
Mar
21
comment How is the conservation of momentum satisfied in long-range attraction such as electromagnetism and gravity?
How I wish virtual particles stopped being a thing.
Mar
20
comment Top speed for a human
Proton $\ne $ photon.
Mar
16
reviewed Approve Applying rotation operator to spin
Mar
15
reviewed Approve Do we need Dark Energy to explain the acceleration of the expansion of the universe?