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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...
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...
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!