Recent content by motoroller

Thanks for the help, everyone!

Is it a theoretical internship? I'd guess that they're looking for grades more than anything else. From my experience, that's the main factor.

I'm doing my MSc Physics project right now (I've already done a 4-year undergraduate course), and I'm finding the going very tough. My exam results were fine (I got a good percentage), but my project is due in a month and I'm finding it extremely difficult. I think part of the reason is...

I've tried a few methods of plotting histograms from unsorted data, but they're all extremely involved (ROOT) or look very "childish" (online tools). What's the easiest way of plotting a histogram from a unicode text file with numbers in it? Thanks in advance - need the histograms for some...

What's the relation for the Compton cross section? I remember it going as 1/(1-cos(theta)) but can't remember the rest. I searched for a derivation but can't find one at the moment.

Yes - thanks, it was the (1-\beta^2) factor I was missing when re-arranging

My LaTeX isn't so good, but substituting: x'=\gamma(x+vt) t'=\gamma(t+\frac{vx}{c^2}) into (x')^2+(y')^2+(z')^2-c^2(t')^2 trying to get x^2+y^2+z^2-c^2t^2 i.e. invariant interval

With two electrons emitted from a decaying atom in opposite directions, the speed can easily be greater than the speed of light between the two electrons (e.g. 0.7c in each direction). If two receivers then pick up the electrons, hasn't the information traveled between the two receivers at a...

I've tried proving the invariance of the spacetime interval from Lorentz transformations 3 times now, but every time I end up with two extra terms that don't cancel! Could I have some help?

Having a mental block, I should know the answer but can't remember! Why are there 2n^2 vacancies for each value of n in an atom? The factor of two is due to degeneracy in s, and one factor of n comes from angular orbitals, 0<=L<=(n-1), which gives n states (2L+1=n), but where does the...

What difference would that make?

Do you have a link for it?

Hopefully someone will post here when the results are announced. Is he still without food and, mor importantly, food?

How did you calculate it in the end?

How much physics have you done? Do you know the physics behind free electron metals?