Lecture 8 | New Revolutions in Particle Physics: Basic Concepts

[shellybirdy]

Very enjoyable thank you

[osclarkos]

i enjoyed this vid

[chrispikeyp]

love the video man

[DancingMaskProphet]

i disliked this video, it just is pointless jargon of no utility for most of us

[bawkrawk]

I think they should put translation in other languages.

[agapitoflores001]

I lecture like this makes Physics interesting. Very nice!

[astrobassist]

great explication in the first 20 mins of how two fermions can act as a boson, which always bothered me in my physics classes until my quantum gravitational theorist friend explained it to me. but he explained it in a different way, which I think got from John Baez...I'll try to remember it and come back if anyone's interested...

[ghghghkkkkkkkkkkkkkk]

Didnt understand the Dirac stuff 8 yrs ago at IC... what a difference non-cryptic lecturers make. Leonard you legend!

[HappyBunnyCarrot]

hmm. erm excuse my idiocy as it might seem to you(i am however, only 14) but i didnt really understand where he was talking about the spin, whats a column vector?

[karlcheah]

@HappyBunnyCarrot I think you mean a column matrix. The column matrix is another way of writing the coefficients of an equation. For example, say we have 3 apples and 4 oranges. We can write it as 3 |apples> + 4 |oranges>, or another way we can also write it is as a column matrix (3 4)T.

So say I add to your collection 2 more oranges, you can calculate (3 4)T + (0 2)T = (3 6)T.

This is shorthand for, and more convenient to write than, [3 |apples> + 4 |oranges>] + [0 |apples> + 2 |oranges>].

[HappyBunnyCarrot]

@karlcheah ahh thnx

[ab616ful]

which idiot pressed the dislike button?

[artofnick]

@ab616ful that's an oxymoron :d

[DrGregoryHouse100]

@ab616ful Sorry, i was trying to press like and slipped

[bhigr]

The interpretation of positrons implies that electrons and positrons always appear in pairs. It reminds me of the fermi-dirac statistic. That's probably where Dirac got the idea for this interpretation. The interpretation is not very elegant, but I guess it's the best thing you can do.

[bhigr]

This is all very nice safe for the title of the lecture. This is really a lecture on more or less basic quantum mechanics. Angular momentum and spin are really basic concepts of QM. "New revolutions in particle physics" doesn't really fit. Nevertheless, these lectures are very very good.

[Chronosaur]

These lectures really fer-me-on.

[csmcmillion]

@Chronosaur Hot physics lectures give me a Large Hadron.

[TristanTheSaint]

what is it you dont understand ?

[kevinatucla]

im lost here