Recent content by fede.na

Homework Statement There is an infinite conducting plate in the YZ plane and a point charge q at (d,0,0). I want to find the field for x<0 and the charge distribution on the plate. Homework Equations The Attempt at a Solution For the region where x>0, I can use the method of...

Thanks for the fast and great answer, it is much clear now. I'm actually majoring in engieneering so I only took an introductory class which was way too basic, sorry if the questions are too basic as well :P There's one more thing I'd like to ask. I understand you can prepare a certain state in...

Hi, I'm trying to get my head around Schrödinger's equation and quantum wave theory. I'll try to shortly state how I understand it so you may see where I'm wrong and better answer the question. In classical mechanics if you solve a linear differential equation, the sum of the solutions is also...

Hi, I've got a few questions about Schrödinger's formulation of QM, mostly about how to interpret the results: 1) How do I choose boundary conditions? I know that I should always normalize the wavefunction and make it continuous but some times you need to make the derivative continuous as...

Hi, I've got a simple question regarding the maximum of the spectral energy density in Planck's black body radiation. It turns out that if you calculate which frequency has the most power associated with it (i.e. maximize R(\nu)), then you do it with wavelength as well, and compare, they're not...

Hi again! So I built the modulator and it works great... but there's something weird about it. I'm using my PC's stereo output to feed both the audio signal and the 30Hz carrier wave. The audio on the left channel and the 30Hz wave on the right channel. I'm generating the signals in Audacity...

Wow that was fast and very helpful, thank you very much nsaspook! I'll post how this turns out in case anyone is interested.

Hi, I'm trying to build a simple analog voice distortion circuit, without any ICs if it's possible. It can get pretty hard to hunt down a specific IC around here. Anyhow, my idea was to get a mic, a speaker, a few oscillators, analog multipliers and RLC filters to build a real time...

hi simon, thanks for taking the time to answer. The thing is that if the delta is a distributional limit, it's a limit to a succession of other distributions, thus, it's a distribution (i'm using the word "distribution" in the mathematical sense of a linear functional, just so that we are on the...

Hi, I'm new to this forum but I've been aware of its existence for a while and it's pretty cool. I finally came up with a question to post so here i am :) I've read a few nice posts on this forum about this topic, but I couldn't find the answer to what I'm looking for. I'm familiar with the...