12:06 AM
5

Given the following potential: $$\begin{cases} \infty & x\leq -d \\ -V_0 \delta(x) & x > -d \end{cases}$$ with d > 0 I would like to compute the condition that has to be verified in order to have at least one bound state. From $\hat{H} \psi(x) = E_n \psi(x)$ and assuming we ha...

12:55 AM
1

I'm struggling to get an intuitive understanding of what exactly Stress is, particularly the "direction" associated with it. In the case of a 1 dimensional bar with just uniaxial loading, the way stress was explained to me was just $\pm\frac{F}{A}$ where $F$ is the force applied to either end, A ...

2 hours later…
2:34 AM
2

My question is: the energy of electron is considered to be negative, so when the energy is supplied though photons the energy of an electron increases (tends toward positive direction) and they get away from the nucleus. Does it mean that it behaves like a proton as it gets away from the nucleus...

3 hours later…
5:55 AM
2

I have a wire that stretches from $x=0$ to $\infty$. The temperature at $x=0$ is given by the unknown function $f(t)$ for $t$ from $-\infty$ to now ($t=0$). I can measure the temperature of the wire at each point now ($t=0$), $g(x)$. Given the temperature of the wire now, $g(x)$, I would like to ...

12 hours later…
5:52 PM
3

I'm reading Kenn Amdahls book "There are no electrons" to familiarise my self with the magical world of electricity. Despite Mr. Ahmdahls insistence on the non-existence of electrons, I find my self thinking about them non the less. My current head scratching revolves around the fundamental radio...

6:41 PM
2

How exactly can I interpret the equation in this form? So we treat $\psi$ as a curve in $Nd$-dimensional space, thus obtaining a solution for $\psi(t)$, but how could we ignore all the position dependence? Thank you

4 hours later…
10:48 PM
1

I've read at many places that accelerating charged particles emit electromagnetic radiation, but on this article on Bohr's hydrogen atom, at the end part, it's written under Limitations of the Bohr Model that: The Bohr Model does not account for the fact that accelerating electrons do not emit e...