Recent content by joris_pixie

Thank you ! Makes sense!

<< Mentor Note -- Thread moved from the technical forums so no Homework Help Template is shown >>[/color] I'm particle physics at the moment and I don't get why the average value of cosˆ2 is 1/3. The section : My solution is : < cos^{2}(\alpha)> = \frac{1}{\pi - 0} \int_{0}^{\pi }...

I have always wondered about this myself :) If spacetime itself would be quantized wouldn't it lead to quantisation of angular momentum and energy ? Also would it be evidence for the "universe simulation" theory ? ;) I personally "feel" like it should be quantized ^^

Energy transition in LS-coupling ! :) Hello ! I have a small question I hope someone can help me :) Lets take for example a 2 electron system with l1,s1 and l2,s2. One electron changes energy due to electric dipole. I understand the rules for electrons in electric dipole transitions: 1) Δl =...

Transition in LS-coupling confusion ! :) Hello :) Lets take for example a 2 electron system with l1,s1 and l2,s2. One electron changes energy due to electric dipole. I understand the rules for electrons in electric dipole transitions: 1) Δl = +/- 1 (parity flips) 2)...

Hello ! I had my fair share of quantum mechanics already :) But today I was wondering something, kind of odd I thought of this so late ... But do continuous energy levels really excist or is it just an approximation. I am asking this cause by my understanding energy is quantized, so...

don't have my calculator here but I think your logic is correct

Yes, they have inertial mass :) Often is said they have no mass cause it's so small compared with neutrons and protons. Relative mass is mr = mi / \sqrt{1 - v²/c²} with v = velocity, c = light of speed As you see for low speed this is the kinda the same as inertial mass :)

:) well a part of your electricity is probably made by nuclear power. The idea of nuclear power comes from relativity Also the atom bombs you explode in your garden

tachyons are theoreticly ;) Probably can't and don't excist But ofcourse never say neveralso to answer some questions :) light does go at the speed of light ;) and it takes so long simply 'cause the stars are so far away ! For example as you should know our solar system is very very very...

_small_ detail ? I'm not very familiar with the subject. But I do believe almost all information is lost except mass and total angular moment. I think you should read up a little more about quantum mechanics and relativity ;)

I have been studying up on special and general relativity lately :) But still a few things aren't clear to me (obviously) Is it energy and mass that curves it or only mass? Or putted otherway does a photon curve spacetime ?Edit: I think I figured it out, it's indeed energy that curves space and...

whoops, already get it !

vector equation [SOLVED] Hello, I'm trying to proof that ∇×(a × b) = a(∇ · b) − b(∇ · a) + (b · ∇)a − (a · ∇)b (where a & b are vectors) But I'm stuck... Probably because this isn't correct: ∇×(a × b) = a(∇b) - b(∇a) ? But i don't know why! Could somebody please help ! Kind...

OK! Got it ! Sorry for wasting your time and thank you ! :) It's true that it is one you have to 'see' ! And if you 'see it' it's easy, but if you don't ... But thanks a lot you guys, got it now!