Recent content by PhysicalProof

Thanks for your assistance everyone! I'm trying to work through them now. Are you sure about C youngman? Aren't there three components in each of those r vectors that we need to use?

I understand how to do (a). However, I'm having trouble with the rest, here. I've never properly learned the order of operation for vectors like this. For example, for (b) does one dot (r - r') with itself BEFORE using the del operator? Thanks guys, help appreciated. Even if you point me...

Yes but how do I depict these reflections? Are they above or below the waves at E ?

Having trouble drawing the wave representations for this diagram. [PLAIN]http://img156.imageshack.us/img156/94/diag.png I'm not sure what the incident and reflected waves should look like. The question is asking to draw the waves in each region. I understand how to calculate the waves just...

I'm thinking that I have to somehow convert that classical expression of V into quantum mechanical terms with operators. Does that sound right?

Anyone have an idea? :(

Homework Statement Homework Equations This is what I'm trying to obtain, in terms of the elements in the question. Assuming that these 'x' values are 'z'. The Attempt at a Solution I'm not really understanding what it is being asked here. Do I just substitute the value of V(z) into...

Bingo, great hint, thank you! Subtle yet it serves me well :D♦

I did consider that but I'm pretty sure the limit definition must be used here (as a requirement). Does anyone have any ideas of how to simplify this beast? EDIT: Really need this one clarified guys. Does anyone have any hints at all? Even a vague idea.

Homework Statement Prove the following, using the meaning of a limit: Homework Equations epsilon > 0, delta > 0 0 < sqrt(x^2 + y^2) < delta | f(x) - 0 | < epsilon (1) The Attempt at a Solution So, I know that I have to elaborate on the inequality in (1), further. However, I'm...