Recent content by pixatlazaki

Later in the week, we were allowed to assume that ##\mathbf{k} = k\mathbf{\hat{z}}##, which simplified the problem a great deal. I ended up performing the integral for ##H'_{fi}## in spherical coordinates. I will post the solution in a week or two.

Homework Statement "Suppose that a hydrogen atom, initially in its ground state, is placed in an oscillating electric field ##\mathcal{E}_0 \cos(\omega t) \mathbf{\hat{z}}##, with ##\hbar \omega \gg -13.6\text{eV}##. Calculate the rate of transitions to the continuum." Homework Equations ##R =...

I'm a UC Berkeley physics student and I've been incredibly satisfied with our department. Professors are generally very helpful and approachable. If you're competent and willing, research positions are quite accessible (especially with Lawrence Berkeley National Lab just up the hill). That being...

Homework Statement A particle of mass ##m## is placed on a smooth table and attached to a fixed point ##O## on the table by a spring with spring constant ##k## and natural length ##l##. (i) Show that the particle can execute circular motion about ##O## with angular velocity ##\omega## provided...

Glad to help, paalfis! Once you finish it, for upper division mechanics, I would heartily recommend Classical Mechanics by Taylor. I think it to be even better than Kleppner and Kolenkow... but that's just my opinion. As for what to read after Purcell, it seems to me that Griffith's Introduction...

Momentum is significant because it (firstly) is a conserved quantity. This is not just true of linear momentum, but angular momentum as well. Noether's theorem shows that if a system is symmetric under a certain transformation, there is a corresponding conservation law. In the case of...

I believe Mogarr knows that it equals 1, though doesn't analytically know how to demonstrate that with standard integration techniques.

Are you familiar with Wye-Delta transformations?

I'm currently an engineering physics student at UC Berkeley. We no longer use this series of textbook, except for volume 2, Electricity and Magnetism by Purcell & Morin. When I say "we" I'm referring to the Honors Physics Intro series of classes, of which I have taken 2. What I can tell you is...