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8:40 AM
@JohnRennie hi
 
@JackRod Hi :-)
 
How are u sir? are u free? actually I have sme questions on solid states
 
Yes I'm free. I'll help if I can though I'm not an expert on solid state physics.
 
sir langevian theory of pragamestism
@JohnRennie can we go through derivation
 
I don't know anything about it I'm afraid.
 
9:11 AM
@JohnRennie actually sir I was thinking about superconductivity
why? when the liquid helium is used in cricuit for superconductivity electron start behaving like boson
like I read some where the term copper pair
 
Cooper pair
 
sorry yes cooper pair typo**
and what kind of dipole generated within the super conducting material
 
Have a read through this:
15
A: Intuitive reasons for superconductivity

John RennieWhen you scatter an electron you change it's energy. So if it wasn't possible to change the energy of an electron you couldn't scatter it. This is basically what happens in superconductors. In a metal at room temperature the electrons have a continuous range of energies. This means if I want to ...

 
ok what about cooper pair? @JohnRennie\
 
I must admit I don't know exactly how the electrons pair up to form the Cooper pair.
 
9:24 AM
sir actually I emailed this query to a super youtuber of phy
mr higgs
and he said he will reply in detail
do u know mr higgs@JohnRennie ?
 
I don't know them. Have you got a link to their channel?
 
higgssino
name of channel
 
I guess this is the video you are thinking of.
 
yes
I can't agree with his cooper pair
 
He gives a rather general description of how the electrons can attract each other to form the Cooper pairs, and it's good description as far as it goes. But the actual calculation is very complicated.
 
9:33 AM
yes do u have any recommendation
please sir
 
The theory is called Bardeen–Cooper–Schrieffer theory:
BCS theory or Bardeen–Cooper–Schrieffer theory (named after John Bardeen, Leon Cooper, and John Robert Schrieffer) is the first microscopic theory of superconductivity since Heike Kamerlingh Onnes's 1911 discovery. The theory describes superconductivity as a microscopic effect caused by a condensation of Cooper pairs. The theory is also used in nuclear physics to describe the pairing interaction between nucleons in an atomic nucleus. It was proposed by Bardeen, Cooper, and Schrieffer in 1957; they received the Nobel Prize in Physics for this theory in 1972. == History == Rapid progress in the...
There will be loads of web sites and books explaining it, but be warned that it's hard. I can't help because I have never studied it.
 
actually sir we have been working on a design linked to this theory
just for fun
 
That sounds interesting. What are you working on?
 
actually two of our friends have gone to us for a workshop on hyperloop
 
Elon Musk's hyperloop system?
 
9:46 AM
YES
I just joined them for fun although I have no technical and theoretical participation since we are friends I am happy to learn about it
 
When that was first announced it seemed very interesting, but it doesn't seem to have gone anywhere in the years since. It seems like it will still be a long time before w can travel using Hyperloop.
@JackRod It's always fun learning about this sort of thing :-)
 
yes
@JohnRennie by the way how is the weather in uk
here it is burning 50
 
It's really nice in the UK at the moment. About 20°C so it's warm but not too hot.
50°C!!! Good grief!
 
indeed
 
I'm surprised you can work at all in that heat.
 
9:51 AM
AC
 
OK :-)
 
we are on summer vacation
 
I guess everyone stays indoors as much as they can.
 
sir just imagine 50 and roads are like burning you can literally make a pan cake of two eggs on road
 
I've never lived anywhere that hot. In my part of the UK it only very rarely reaches 30°C.
 
9:53 AM
I feel jealous
my ac temp is 20
can u share pic of today
@JohnRennie we are having thandi rabri u know what rabri is?
 
That's the view from my desk.
 
a traditional summer drink
 
@JackRod I've never heard of it ...
Is it a Rajasthani drink?
 
yes
it can be used in winter as well to save people from cold
and in summer from heat wave
but for winter we boil it with water
 
What is it made from?
 
10:24 AM
bazra,and makki
or millet and maze with acidified chach
or butter milk
with roasted cumin seeds and salt for summer
@JohnRennie
un is celebrating millet year
it was in news i thing
 
I've never tried it. I wonder if you can get it in the UK ...
 
it is easily available u can make it in home withing minutes
a very effective natural drink against heat and cold wave
just type rabri making rajsthan on u tube and there are thousand of videos
 
I'll have a look later.
 
have good day sir
bye
 
Bye :-)
 

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