This might seem like a silly doubt but I am confused about this. For what kind of waves is the wave equation in 1+1D satisfied? $$\frac{\partial^2 f(x,t)}{\partial x^2}=\frac{1}{v^2}\frac{\partial^2 f(x,t)}{\partial t^2},$$ where $f(x,t)$ is the disturbance of the wave at position $x$ and time $t...

First of all, I will ask the patience of community because this is a "need-an-explicit-calculation answer". Pure abstract considerations will not, I think, help me very much. So, I would like some sort of step-by-step rule to calculate tetrad coefficients. I will explain (please consider the metr...

The Chandrasekhar limit assumes the white dwarf is made of carbon, but hydrogen has a much lower ratio of mass to electrons, so the limit should be different in that case. And electron degeneracy pressure might not even be the limiting factor, if neutronization or cosmic ray initiated fusion chai...

I was wondering, as my question suggests, that which kind of waves are more efficient in transporting energy, considering longitudinal and transverse waves. I checked out this post here, but didn't get a satisfactory answer. What I think is that because for longitudinal waves, because the motion ...

I read about Kepler's Laws and in one of them he mentions that the path of a planet is an ellipse, with the sun as one of its foci (I'm narrowing down this to only our solar system). However though I'm not experienced in this subject, I had a doubt. I read in places that the Sun is not stationary...

I am looking for insight on quantum field theory, and more precisely, I am interested in having a low-detailed idea of what a quantum field theory is about; moreover, I should say hat I am a mathematician with little physical background. I found this question: What are quantum fields mathematical...