Hey has anyone had experience with a good book on Laser-Plasma interaction at a graduate level? I've seen a few on amazon and the like but they rarely have reviews so I have no idea how good they are.
Thanks you!
What do you mean here, surely we would expect the Potential difference to tend to zero (but still remain finite) as the distance between the cylinders tended to zero? Obviously this has limits, this theory is not valid for instance on an atomic scale as we have assumed a continuous charge...
Too early for some of us across the globe! Thanks again. Your word is enough, I'm sure it makes sense physically because as d->2R the minimum it can be, the log tends to ln(1) which is 0. ie when the cylinders are touching there is zero potential between them? I know its just one case, but a...
I feel kind of silly now, you're completely right, I don't know why I was trying to get a general formula for the potential at a point s rather than the difference between the cylinders. Too close to the problem I suppose!
(also thanks haruspex and rude man for seeing this too!)
So...
Homework Statement
Find the potential difference between two oppositely charged, infinite cylinders of radii R whose axes lie at $$y =+\frac{d}{2}$$ and $$y = -\frac{d}{2}$$ They have surface charge densities of magnitude $$\sigma$$
Homework Equations
The family favourite - Gauss' Law...
Homework Statement
This isn't for a homework problem per say, though it is a coursework question. I'm writing a lab report on Multi-Quantum Well Laser Diodes and am trying to explain the basic semiconductor physics behind it. As such I need a diagram of the band structure.
Homework...
Hey I'm currently an undergraduate Physics student in my third year. I wish to continue on with Physics and complete a Phd
Preferably I'd like to avoid doing a masters, I've looked at a lot of threads on here and the general consensus is that with a three year bachelors (like the ones in...
Homework Statement
So I'm having a bit of trouble getting my head around this concept and was hoping someone would be able to shed some light on it.
I know the definition. i.e free charge isn't bound to a nucleus whereas bound is. But physically what difference does this make. i.e are free...
Homework Statement
Hey I just want to clarify something. In particle physics, isospin is a flavor quantum number. Is it isospin or the z component of isospin which is conserved in particle interactions
Homework Equations
electron neutrino + proton -> electron pion+ + proton
The...
Ah yes that makes sense!
Thats really cool, I suppose sometimes when trying to wrap my head around these things I tend to forget how awesome their applications are!
So as opposed to what i would have considered a cross section to be before (a 2d slice of a 3d object) a cross section in terms of scattering is a probability that particles will undergo scattering? Surely they should have just defined a new word for that :P
I'm just wondering what the difference is between a cross section and a scattering cross section? Or is there any? I can't seem to find anywhere that clears it up, in fact there's a whole section on scattering cross sections in Kibble and Berkshire but they don't define it once :P
Homework Statement
See attachment
Homework Equations
for an infinitely deep q well of width L
\psi(x)=\sqrt{\frac{2}{L}}Sin\frac{4\pi x}{L}
<\psi_{n}|\psi_{m}>=0
<\psi_{n}|\psi_{n}>=1
The Attempt at a Solution
Taking the inner product...
Homework Statement
Let D=\{(x,y,z)| z^{2}=1+x^{2}+y^{2} , 1<z<3\} Compute\int\int_{D}zdS
Homework Equations
From lectures I know;
\int\int_{D}\delta dS=\int\int_{D}\delta\sqrt{(\frac{\partial f}{\partial x})^{2}+(\frac{\partial f}{\partial y})^{2}+1}dxdy
The Attempt at a Solution...