Recent content by DemoniWaari

I was trying to determine the best oxide thickness and material for maximising the contrast of one atom thick material layer on top of silicon chip. Using Fresnel equations I was able to do plot the contrast with respect to oxide thickness and wavelength, but alas, contrast seems to be sometimes...

Hello! I'm having my materialphysics exam in a few days, and looking some of the older exams I saw that there are many times questions about band structure and density of states. More specifically there might be a picture of some band structure plus the density of states, like this. Then...

Yes I'm familiar with that, but isn't that only with the circular accelerators? So if I have a linear accelerator this would not be present.

Hello. So I was wondering that when you shoot an electron through an uniform magnetic field, obviously Lorenz force starts to skew the path to that corkscrew shape that we all know. But then there is an acceleration towards the center of the circle, and if the the velocity of the electron...

Oh yes, I get now the new equation part! But what baffles me still is the fact that my friend's textbook says that \frac{\partial I }{\partial t}L = RI after the switch is open. But if the current is zero, how can that be? Or is it a misprint? Edit: And in real world situation the change in...

Hello there! Now if I have a very very simple RL-circuit with a voltage source and we have a switch which is suddenly flipped in the off-position... does the SAME differential equation apply as if it's flipped ON? This I mean: \frac{\partial I }{\partial t}L + RI = U I do understand...

Oh thank you all for your answers! This cleared up my thoughts :)

I was just wondering that when we have a molecule, and you introduce heat, the molecule starts to get translation, rotation and vibration energy. I'm considering just a molecule with two atoms and one axis which binds them together. Now the real question is that why is there only two axis in...

OH YES! Thank you kind sir.

Homework Statement How large proportion of wavefront's power penetrates dielectric material's surface in a perpendicular collision from air. The only parameter that I have is \varepsilon_r = 16 where \varepsilon_r is the relative permittivity.Homework Equations \varepsilon = \varepsilon_r...

Oh man of course l'Hopitals rule! Thanks for refreshing my memory!

Hey there, I was trying to check my calculations of one laplace tranformation and I needed to know a limit: f(x) = (-1+e^x) / x as x -> 0. And I can't seem to find the answer for this even though I try and try. So little help? Oh I was just thinking that can you use taylor's series for this...

Yeah I don't have enough expertice in order to fully understand this. But I think homeomorphic's answer was enough for me, though I still can't understand it fully but that's just fine, I'll get to it later on with my studies (hopefully). Anyway thanks guys, now I'm a little bit smarter!

Normally the integral over a point is zero, but in this case, is it just defined to be one? How the f- can you do such a definition? And if I derivate sign function (or Heaviside step function) and I get that infinite at zero, can I just go "oh well it looks like dirac's delta function thus I...

Hi! I'm having some difficulties understanding WHY sign function's derivative actually is dirac's delta function? Or more specifically why the derivative equals one at zero and NOT infinite, as the sign function's "actual" derivative at zero equals infinite? Atleast it would make sense. Thanks...