Recent content by ghosts_cloak

Hi, lol! The question is sooo long I just lost sight of what I was doing. Yep it is trivial, I see now (actually, before I read your post, but thanks a lot anyway) Cheers, Gareth

Hello :-) I am just finishing my QM homework and I have just showed that the wavefunction for a particle in an infinite 1D potential well form an orthonormal set of eigenfunctions. It asks me to express my results in terms of the Kronecker delta: Delta[nm]={1 for n=m and 0 for n!=m}...

Hi :-) Oh I see, r should actually be R2-R1 in the equation I posted for the potential difference? Thanks, Gareth

I may be missinterpreting you, but LHS means Left Hand Side, and RHS is the Right Hand Side. Hope that helps, Gareth

Hello guys, well its that time of the week when I am busy working on my homework again! One of this weeks questions is that there are 2 hollow concentric conducting spheres which hold charges Q1 (inner shell, radius R1), and Q2 (outer shell, Radius R2 ) 1) Find the potential difference...

Hi :-) Thanks for the reply. Yup, I thought the second method gave a better result! I wouldn't normally have bothered about posting it on here but the lecture notes kind of hint towards the first method, and we haven't covered Weins law in this course (although we have in previous courses)...

Hi guys! Question: A soft x ray source has an observed luminosity of 10^30W. The spectral shape indicates black body radiation with a peak in the emmision at 4KeV. Estimate the radius of the object. Suggest what source this might be. So, using L=sigma*A*T^4 and the peak energy is approx kT...

Phew, after a whole day on it, I think I have cracked it! This feeling is what makes physics and maths the greatest! Thanks for your help, ~Gareth

Hiya, Well, that's the point really, I need a little push to get me started! I am thinking it involves seeing how much work it takes to bring a hoop of charge from the spherical shell to the sphere, and then integrating over the whole shell. And then, integrate from r to a to make up the...

Hi guys! I have been working on this question all day and am getting no where :cry: I really can't get to grips with Electromagnetism, arghh! The question is :http://www.zen96175.zen.co.uk/problem.GIF I would NOT like anyone to post a solution as its assessed work but I would IMMENSELY...

Hiya, thanks for the effort you have put in! I think I have the solution now, I found the potential first and then the electric field from that, and everything drops out nicely and appears like a point charge as required. I will of course work through your solution also to compare, I thought...

Actually, I see where you get the area from now :-) Ill keep at it.. ~Gaz

Hi, thanks for the reply :-) I am a little mystified by the area you mention... in what orientation are you taking this ring portion? Maybe it will come to me, I am working on the problem now but at the moment I can't see it... Thanks! ~Gaz

http://archives.math.utk.edu/visual.calculus/4/int_by_parts.3/ I just found this on google, and it appears to be a nice introduction, and takes you through each step. Perhaps a little basic for what you want though? Hope it helps, ~Gareth

http://www.zen96175.zen.co.uk/question.GIF Hi everyone :-) This is my first post here! I have a question regarding electrostatics, in the picture above. I am not looking for the solution at all as this work will be assesed, I am just hoping that someone can verify/ poke me in the right...