Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
20,746 
I do not know if you saw this in my other thread, but I suppose this makes my question clearer. Are the conductive and...

Feb906 06:05 PM
Gokul43201

12 
1,859 
Why is there no allowed transition from the 2s^2 S_{\frac{1}{2}} state to the 2p^2 P_{\frac{3}{2}} state in the...

Oct2610 02:15 AM
DrDu

1 
1,859 
Dear all, I have been thinking, if insulators have their valence band filled, then which band does the extra electrons...

Dec1310 07:49 AM
zhanghe

7 
1,859 
What prevents electrons and protons from being stuck togeather? how do they just keep flying around the protons and...

Jul2104 09:09 PM
Gonzolo

4 
1,858 
Does anyone know how to solve a pair annihilation problem ( positron and electron), for the energy of the resulting...

Oct304 12:53 AM
CollectiveRocker

6 
1,858 
Ahoy,
I'm trying to do a calculation of the electronelectron self energy of a Fermi Liquid, which is supposed to...

Jun2707 12:04 AM
Mute

2 
1,858 
hi,
Before i begin i am not sure where to put this post wether here or in the general section.
Is newtons 3rd...

Mar3004 09:10 AM
HallsofIvy

7 
1,857 
Hi,
This is my first post on this forum.
My question is
How is motion of plasma controlled through magnetic...

Jan705 06:37 PM
LURCH

5 
1,855 
Hello everyone,
Can anyone give me a list of the different types of Hall effect. I know the following:
1 Quantum...

Oct1711 01:50 AM
Razan

0 
1,855 
Hi ;
Is there anybody using SageMD for molecular experiments. I am planning to set up a mail group for SageMD or all...

Nov1205 08:14 AM
marlon

1 
1,854 
Hi,
In alot of places it states that one of the great successes of the free electron model is that it gives, more or...

Jan2110 08:38 AM
Cheetox

2 
1,854 
can anyone let me know??

May2604 12:19 PM
alanveron

5 
1,853 
Hello I just recently finshed physics honors on a high school level, but my class because of bad weather, and a tight...

Jan705 06:11 PM
LURCH

8 
1,853 
hi i was reading the following paragraph and i do not understand what it means. can someone explain what it means to...

Apr1010 02:48 PM
lavster

0 
1,853 
In XRD, to examine the diffraction pattern and the determine the elemental structure, a thin layer of sample is...

Oct1709 12:58 PM
Modey3

1 
1,852 
I post in the QM section as an answer in terms of photons rather than just EM waves would be better.

Oct1412 01:56 PM
FeynmanIsCool

8 
1,852 
Can somebody tell me what is the minimum theoretical distance between adjacent lattices in a crystal? I've read about...

Jun1804 03:23 PM
Gokul43201

2 
1,851 
Background: Math & Physics undergrad
Reason for asking:
So I was trying to understand semiconductor diodes and...

Apr610 06:05 AM
JeffEvarts

3 
1,851 
Could anyone please explain what 'Superconducting instability' means?
If there are some good references to read,...

Feb1711 07:10 AM
HJ_original

3 
1,851 
How does high temperature break down a forward biased pn junction?

Jan2910 05:39 AM
akhil123

0 
1,849 
The title sort of tells it. My question is, how is it that a BoseEinstein condensate compresses and slows down the...

Feb2110 09:54 AM
RasRemi

0 
1,849 
Is anyone familiar with this or heard of this concept before?
It started in 1953 by a paper by Dicke published in...

Feb812 03:50 PM
Cthugha

5 
1,847 
I need to learn and understand why a component of a binary solution cannot be 100%. This needs to be done...

Feb111 01:29 AM
Bystander

4 
1,845 
Hi all,
I'm looking for books or papers that give a pedagogically clear and reasonably uptodate discussion of...

Feb812 05:30 AM
ZapperZ

6 
1,845 
Hey everyone,
So unfortunately I haven't taken Stat Mech yet (and my GRE is in a week), but through casual reading...

Oct1011 08:10 AM
genneth

2 
1,843 
Hi, does anybody know why the melting points of materials drop down when its size gets smaller down to nanoscale? For...

Jun1705 11:09 PM
Gokul43201

4 
1,843 
I am reading Analysis and Design of Analog ICs by Gray and Meyer. In Ch. 2, they describe using MOS technology for...

Sep413 11:11 AM
d.arbitman

12 
1,843 
Semiconductors and isolators are only different in that the energy gap of the former is smaller than 2eV, and of the...

Apr206 09:55 AM
Barth

1 
1,842 
I guess my most general question would be:
Given a P/N junction. Lets say two circular discs, one P one N. There...

Oct2507 10:09 PM
K.J.Healey

2 
1,842 
Hi all
I have a question regarding Bloch's theorem (also known as Floquet's theorem) and its use. I have seen in...

Jun3009 08:14 AM
Modey3

3 
1,842 
I'm trying to grasp the basic concepts of plasmons and can't quite picture what is going on.
When light is...

Feb812 11:07 AM
DrDu

4 
1,842 
Does there exist a database for the Partition function at different temperatures? As I understand it it only varies...

Apr2409 12:38 PM
nordmoon

3 
1,840 
Haven't been able to find the answer anywhere IRL yet, so I thought I'd see if someone in the PhysicsForums could help...

Nov2707 09:11 AM
Gokul43201

1 
1,839 
There's this equation e_{ij} = \alpha_{ij}\DeltaT + d'_{ijk}E_{k} + Q'_{ijk}H_{k} + s_{ijkl} Sigma_{kl}, which is the...

Jan3110 12:37 PM
sol66

2 
1,839 
Assuming a density of exactly 1 g/cm3 (assuming that even matters)
So, at 1 kelvin, how fast do the molecules...

Aug2812 07:26 PM
Mute

4 
1,839 
The Seebeck coefficient is the differential drop in voltage per unit temperature across a conductor. Goldsmid says...

Apr1112 07:31 AM
M Quack

1 
1,839 
We just studied E.M. waves; May I assume that whenever we flip a switch, an E.M. wave is produced?
for example,...

Dec2704 11:37 PM
pervect

4 
1,838 
What are the effective mass of conduction band (mc) and valence band (mv) of insulator material Al2O3. Kindly tell me...

Aug1111 02:41 AM
islam.hashem

4 
1,838 
Hi,
Suppose we have a 2 site Hubbard model, with the hopping Hamiltonian given by H_t and the Coulomb interaction...

Sep1311 12:32 AM
vkroom

7 
1,837 
Could Anyons and Fractional quantum Hall effect create 2D ribbons w/fractional electric charge (e/3) that combine to...

Sep1409 02:22 PM
ensabah6

11 
1,836 