Hi
thanks for the reply. I don't think I quite follow though. K is the wave number, given by 2pi/lambda isn't it? How can that be imaginary? k would be 2pi/0.3 recurring for EM of 10^9 Hz... Would my answer then just be 0.10=exp(x2pi/0.3) solve for x?
Homework Statement
The dispersion relation for a plasma is given by
k^{2}=\frac{\omega^{2}}{c^{2}}(1-\frac{\omega^{2}_{p}}{\omega^{2}})\omega^{2}_{p}\:= \frac{Ne^{2}}{m_{e}\epsilon_{0}}
Where N is the electron density
During re enrty of a spacecraft there was a radio blackout of all...
I got it! Thanks a lot. Ha, I somehow messed up with the right hand rule, which is pretty basic, but that wasn't the problem. I just made a copying error and forgot about one of the e^{0}B which should have become B, not nothing. Thanks a lot!
Homework Statement
Using Stoke's Theorem, evaluate the contour integral:
\oint F.dr
as an integral over an appropriately chosen 2 dimensional surface.
Use F = (e^{x}y+cos\siny,e^{x}+sinx\cosy,ycosz) and take the contour C to be the boundary of the rectangle with the vertices (0,0,0)...
Hi all, just a quick query about data analysis:
Homework Statement
Having been asked to use Chi Squared analysis to test the validity of a fit, I have calculated my data to have a reduced chi squared of ~ 0.75 to 2 dp. I know that a reduced chi squared (chi squared / number of degrees of...
Hi all
I was just looking through my notes from my first year of my degree, and I couldn't find a missing bit. I know that Planck's postulate states that the allowed energies of a quantum simple harmonic oscillator are 0, hf, 2hf etc and that by the Schroedinger equation, you get E(n)=(n+1/2)...
1.The position of a particle x(t) obeys the following differential equation
d^2x/dt^2 + 4(dx/dt) + 3x = (3t/2) -4
If at t=0, both x=0 and dt/dx=0, find x(t)
Attempt at solution
I've found the homogeneous solution to be y=Aexp(-3x) + Bexp(-x), and know how to find x(t) given...