Recent content by Hypnotoad

When an optical field is written as: E=A_1e^{i(\vec{k}\vec{r}-\omega t)}+A_2e^{i(\vec{k}\vec{r}-\omega t)}+c.c what does the c.c. for?

When I was applying for grad school, they asked for my GPA during my last two years in school. At that point, you are probably mostly in your physics and math classes, so even if you are only getting B's in Chinese, your GPA should be fine. Classes you took your first couple years of school...

I'm currently working towards my MSc in physics. Pretty much all I have left is to finish my thesis project. I hope to have the research portion done by december and my thesis written and defense done by february, so I've started looking for work. The problem is I've never had a job in...

I'm trying to figure out the number density (molecules/unit volume) of the dye for a sample of dye doped PMMA. The information I have is that the dye makes up 1% by weight of the mixture used to make the sample. I also have the chemical structure of the dye. I looked up the structure of the...

I need a little help on an E&M problem I'm working on. A dielectric slab suspended in free space has a time dependant, non-uniform electric field inside of it (it was given in the problem, but I don't have it with me right now). For the material \mu=\mu_0 and \epsilon=2.56\epsilon_0. I need...

Thanks. I can't believe I missed that.

I'm studying for my math physics final tomorrow and I'm going through a derivation done in our book, but I'm stuck on this one step. The derivation is of the geodesic equation using variational calculus (this is done in the Arfken and Weber book, on page 156 if you have it). Anyways, I follow...

How do you delete a post?

1. Thanks for the latex lesson 2. n=1 3. Turns out it was just my math. Although I did that calculation at least 4 or 5 times and kept getting the same answer before. I don't know what I was doing wrong, but it works much better now.

I'm trying to find the uncertainty in \theta where \theta is given by: \theta=sin^{-1}\frac{n\lambda}{d} in this case, I am assuming there is no uncertainty in \lambda. This is what I tried: \delta \theta=\sqrt{(\frac{d\theta}{dd})^2(\delta d)^2} (the total derivative in there...

There is an error between these two lines. You are raising the momentum operator to the nth power, not the wave function.

I have my classical mechanics final coming up soon and I was wondering if some of you could help me study. The format of the test is a 30 minute oral exam where we will be asked 3-4 questions. Obviously these will be mostly conceptual, since there isn't time to do a lot of math. My problem...

Consider a system with one degree of freedom whose density distribution at time t=0 is given by: D(x,p,t=0)=\frac{1}{\pi\sigma^2}exp[-\frac{m\omega^2}{2}x^2-\frac{1}{2m}p^2] where x is the generalized coordinate and p the conjugate momentum. The Hamiltonian of the system is given by...

You should be fine with math, but you will probably want to take an intermediate physics class. Optics would be a good choice, especially if you are headed towards photonics.

I'm most of the way through my first semster as a grad student going for my masters in physics. I'm not sure if it is just my workload this semester, but I am getting really burned out. I want to work in industry (either private or government, but I'm not particularly interested in education)...