Recent content by donquixote17

Thanks for the help. That answers my question.

How does shining light on a metal affect it's conductivity? Specifically, I'm wondering about IR light (1.5um) shining on either Aluminum or Gold. My intuition would say that if the metal isn't a perfect reflector and has some absorption, it would increase the number of carriers, thus...

Great. Thanks so much!

I'm reading an article that has n+, p+, and p doped silicon wafers. http://iopscience.iop.org/0953-8984/10/44/001" I hadn't heard of n+ or p+ before, just n and p. I noticed in the article that n+ and p+ had really low resistivites (10^-2 Ohm-cm) and p had a resistivity of about 10 Ohm-cm. So...

If you have a perfectly flat, rectangular raft and a perfectly flat, rectangular boat, which will displace more water? Or will the water displacement be the same. I remember that the water displacement is dependent on the shape of the floating object and the weight, but I can't remember exactly...

Homework Statement I need to solve the Schroedinger equation (Using DSolve in Mathematica) for a potential that is infinite below z=0 and V=mgz for positive z. Homework Equations TISE: \psi \text{''}[z]+\frac{2 m}{\hbar }(\text{En}-V[z])\psi [z]==0 The Attempt at a Solution...

yes that makes sense. Thanks!

Thanks Dick, I kind of get the right answer, but it's just not the way I was thinking about it, so starting with the defining property we have \int{dx f(x) \delta(x-c)} I make the u substitution u=ax, and du=a dx \frac{1}{a}\int{du f(u/a) \delta(u/a-c)} So that right there tells me that...

Using the defining property of the dirac delta function, \int{dx f(x) \delta(x-c)} show that \delta(ax)=\frac{1}{|a|}\delta(x) I think all I need to do is make the right u substitutions and it will come out right, but I can't think of how to make the substitutions...after a long time working...