Recent content by gboff21

I had a feeling that's what you'd say. But do you have any recommendations yourself on what to do in the next years like an internship (still need a job though) or other part time things?

Thanks for the quick reply. I'm tending towards a job in programming and software development. Do you know if that would be seen as a asset in a PhD application or should I look at something more related to physics (even though they are pretty hard to find)!

I applied for PhDs in astrophysics/cosmology last year and got a few interviews but with no successes and now I've just graduated from Durham with a 2:1 in physics. So obviously now I need a proper job! Since there are a few attractive graduate programmes, I'm wondering whether I should try to...

Ok I get it! d/dt (\dot{\phi} r^2 \omega^2)=0. So \dot{\phi} = k/(r^2\omega^2) Thanks!

Homework Statement The metric for this surface is ds^2 = dr^2 + r^2\omega^2d\phi^2, where \omega = sin(\theta_0). Solve the Euler-Lagrange equation for phi to show that \dot{\phi} = \frac{k}{\omega^2r^2}. Then sub back into the metric to get \dot{r} Homework Equations L = 1/2 g_{ab}...

Hi, I'm just applying to PhDs at the moment and some projects have two or even three supervisors! What do you guys think about this? I thought it was normal to have only one! Thanks

Oh, ok here you go (attached)

Homework Statement Here is a photo of a page in Laser Physics by Hooker: https://www.evernote.com/shard/s245/sh/2172a4e7-63c7-41a0-a0e7-b1d68ac739fc/7ba12c241f76a317a6dc3f2d6220027a/res/642710b5-9610-4b5b-aef4-c7958297e34d/Snapshot_1.jpg?resizeSmall&width=832 I have 3 questions (I'm a bit...

Thank you very much. I've been searching everywhere for a clear concise explanation! The answer is actually quite simple when you know about it! Thanks again

If a baryon wavefunction is \Psi = \psi_{spatial} \psi_{colour} \psi_{flavour} \psi_{spin}, and we consider the ground state (L=0) only. We know that the whole thing has to be antisymmetric under the interchange of two quarks. We know that colour is antisymmetric (always colourless) and...

Yes the p is supposed to be unprimed. I've solved it now. Thanks anyway. Here it is for anyone who's having the same problem: You start off (or derive it as I had to, to understand it) with the lorentz transform for velocities in two frames u = \frac{u'+v}{1+frac{uv}{c^{2}}} Know that E'=\gamma...

Homework Statement Derive the relation: E' = \gamma (E + \beta p c)Homework Equations p' = \gamma p \\ E^{2} = p^{2} c^{2} + M^{2}c^{4}The Attempt at a Solution start off with stationary frame S E=mc^{2} then in moving frame S' E'^{2} = p'^{2} c^{2} + E^{2}: lorent transform momentum: E'^{2} =...

Is \int\int \sigma f(E,E')dEdE' = \int\int \sigma dEdE' correct then?

Thanks for pointing the [/itex] out. But how would you involve the f(E-E')?

The Question: The cross section for the scattering of two particles with spins sa and sb via a resonance with spin J is: \sigma(E)=\frac{\pi\lambda^{2}(2J+1)}{(2S_{a}+1)(2s_{b}+1)} \frac{\Gamma_{i}\Gamma_{j}}{(E-E_{0})^{2}+\frac{\Gamma^{2}}{4}} with \lambda=1/p, E is the centre-of-mass energy...