Mainly I don't get how plasma loses energy by conduction, which is what I have read. Is it just from the collisions between plasma particles and the wall?
Thanks!
Homework Statement
It commonly happens that the hyperfine structure in a transition is dominated by the contribution of an s-electron in one of the levels. What property of s-electrons could be responsible for this?
A transition of this kind occurs at 494nm in singly ionised 133Cs between a...
Hi, I need to learn about nuclear fusion and how the Tokamak works. Can anyone recommend any books/texts/websites that would be useful? I am a 3rd year Physics undergrad and have done a reasonable amount of EM, to give you an idea of the level - I don't want a layman explanation but also not...
Homework Statement
A particle of charge q and mass m is in a harmonic oscillator potential V0=0.5m(wx)^2. A perturbation is introduced which changes the potential to V=V0 + dV with dV=0.5sm(wx)^2 where s is small.
Use perturbation theory to compute the first order shift in the ground state...
Homework Statement
Hi, I've been given a problem set and there is suddenly new notation that I've never seen. Can anyone shed any light on what this means:
"Treating a0 as a parameter, write down the complete wavefunctions (including radial
and angular parts) for the states 1s, 2s, and 2p...
Homework Statement
A bar of soft iron of cross sectional area A and relative permeability μ is bent into
a ring of radius R. The bar is wound with n turns of a wire carrying a current I. Deduce a value
for the magnetic field in the iron, explaining your assumptions.
(b) A narrow gap of...
Homework Statement
In the rotation spectrum of 12C16O the line arising from the transition l = 4 -> 3 is at 461.04077GHz, while that arising from l = 36 -> 35 is at 4115.6055GHz. Show from these data that in a non-rotating CO molecule the intra-nuclear distance is s ~ 0.113 nm, and that the...
Homework Statement
The matrix R(q) for rotating an ordinary vector by q around the z-axis is given by@
cosq -sinq 0
sinq cosq 0
0 0 1
From R calculate the matrix J(z).
Homework Equations
-The Attempt at a Solution
All I know is that U(q) = exp[-iJ(z)q] is the unitary...
Thanks in advance for reading/replying
Homework Statement
In the interval (t+dt, t) the Hamiltonian H of some system varies in such a way that |H|psi>| remains finite. Show that under these circumstances |psi> is a continuous function of time.
A harmonic oscillator with frequency w is in...
Thanks for replying
But if the field is proportional to r^(-2) and in the r direction, then divE is just the differential of r^(-2) wrt r. Which is proportional to r^(-3). So at some point r=a outside the sphere, divE=a^(-3), not zero.
I still don't understand
Homework Statement
I just have a little question about Gauss' Law (differential form).
If divE = p/e0 where p is the charge density and e0 is permittivity of free space.
But if we had a sphere with a total net charge of Q, then outside the sphere, the field is E=k/r^2 I think.
Then...
I had a look at that chapter, thanks. It seems I can show that the Hamiltonian of both situations are the same fairly trivially. But then this doesn't use the states at all. Hmm
Homework Statement
Consider a system of two particles of mass m that each move in one dimension along a given rod. Let |x> be the state of the first particle when it’s at x and |y> be the state of the second particle when it’s at y.
A complete set of states of the pair of particles is...
But in the two slit experiment, if you have an amplitude A1(x) that the particle will go through slit 1 and hit x, and A2(x), then the probability of it hitting x is given by
|A1(x) + A2(x)|^2 which gives an interference term. What is the difference here?
Thanks