Recent content by vaart

Sure, here is a paper that I have been recently reading. http://arxiv.org/abs/1105.2326 It's figure 3 at page 15. At section 3.2, they are explained but I don't really understand it yet, they say that they use the Li and Ma paper...

Dear All, I have a question regarding the understanding of anisotropy of cosmic rays and how to understand them better. To determine the anisotropy I have seen a lot of papers where they use maps that have a Relative Intensity map and a Statistical significance map of the sky. I understand...

Ah, I think I understand now. Let me rephrash in my own words. 1) Total anguar momentum is not always conserverd because in a non rotational invariant Hamiltonian rotational energy will be transvererd to potential energy and vice versa. 2) Jz is still a good quantum number because Jz=Lz+Sz and...

I have a question about the Zeeman effect and pertubation theory. I read in Griffiths that with the strong Zeeman effect the total angular momentum is not conserved but Lz and Sz are. I don't really understand why this is in a physical sense, because I thought that angularmomentum always was...

Thanks for the advice! And thanks in overall, my first FP experience has been a pleasent one, I will be surely posting more question that are troubling me in the future :D

Thanks! I think I just saw it to complicated. If I understand you correctly, all the particles in the train has the same acceleration and if there is another force acting on the whole train, all the particle will be affected accordingly. The reason I came up with this question is that when I...

I had a question that was on my mind for a while. The general question is about structures and a force on that object in a certain direction and how the entire structure is accelerated by this force. An example: If I act a force on two trains with equal mass that are attached to each other...