Homework Statement
\psi(x)=\frac{3}{5}\chi_{1}(x)+\frac{4}{5}\chi_{3}(x)
Both \chi_{1}(x) \chi_{3}(x) are normalized energy eigenfunctions of the ground and second excited states respectivley. I need to find the 'wavefunction in the energy representation'
The Attempt at a Solution...
Homework Statement
Consider a sphere of magnetic material with radius R and magnetisation M in an applied field B_{applied}. Find an expression for:
a) the total current flowing around the surface of the sphere;
b) the net field at the centre of the sphere.
Homework Equations...
Homework Statement
Write down an expression for the current density per unit length flowing at the surface of a magnetised material.
The Attempt at a Solution
Any ideas?
That thread has proved helpful - i have cracked the derivatives. Thanks.
Another question though, k is the wavenumber right? Is the wavenumber equivalent to the direction of proporgation?
I mean, from the solution k, E and B must be orthogonal, but how does this relate to the direction of...
So I am trying to work through the proof why why the direction of proporgation, the E field and B field are all orthogonal to one another.
What i have is...
E=E_{0}e^{i(k\ \bullet \ r-\omega t)}
B=B_{0}e^{i(k\ \bullet \ r-\omega t)}
\nabla \times E= -\frac{dB}{dt} \Rightarrow k...
Homework Statement
What is meant by the completeness of eigenfunctions?
The Attempt at a Solution
I understand the AX(x)=BX(x) where A is the operator, B is the eigenvalue and X(x) the eigenfunction.
I cannot find anywhere anything on what is meant by the completeness of...
Latex isn't working on this post so here it is without Latex:
Homework Statement
Solve the euler differential equation
x^{2}y''+3xy'-3y=0
by making the ansatz y(x)=cx^{m}, where c and m are constants.
The Attempt at a Solution
y(x)=cx^{m}
y'(x)=cmx^{m-1}
y''(x)=cm(m-1)x^{m-2}...
Homework Statement
Solve the euler differential equation
\x^{2}y^{''}+3xy'-3y=0
\int_X f = \lim\int_X f_n < \infty
by making the ansatz [tex]y(x)=cx^{m}[tex], where c and m are constants.
The Attempt at a Solution
[tex]y(x)0=c^{m}[tex]
[tex]y^{'}(x)=cm^{m-1}[tex]...