# Paul Dirac

by James Reason8
Tags: dirac, paul
 P: 2 Good book, The Strangest Man by Graham Farmelo a biography of Paul Dirac man into antimatter, not just physics but also generally how things were in the 1900s including the wars and politics
 P: 3,015 Paul Dirac was born in 1902, so he was at most in 2nd grade by the end of 1900's.
 P: 2 Hey the root, besides the book tells about his father Charles and the first thought of antimatter was late 1800s, not by him
P: 3,015

## Paul Dirac

 Quote by James Reason8 ...the first thought of antimatter was late 1800s, not by him
True, but those were associated with ideas about matter with negative gravity and aether theories as sinks in the flow of aether as opposed to sources (squirts) which were interpreted as ordinary matter.

Both of these ideas ware discarded by the time Dirac proposed his own theory. The most important aspect of matter and antimatter is that there is a gap between the two states equal to 2mc2, which can be considered a consequence of Special Relativity - a theory which made aether obsolete. Also, antimatter has the same gravitational properties as ordinary matter.
 P: 239 The book is one of my favorites. It is very engaging and not technical. I think when the topic creator refereed to the 1900s he was referring to the 20th century in general, which is entirely correct. There are few books I have read (and I read a lot) that rival this one.
P: 341
 Quote by Ken Natton ‘A philosopher who regards ignorance of a scientific theory as insufficient reason for not writing about it cannot be accused of complete lack of originality.’
Nobody who doesn't write with insufficiently few double negatives cannot be regarded without a certain amount of lack of disrespect.
 P: 272 Ah yes yossel, an absolute masterpiece. I trust that I can expect to see your own version as your signature aphorism then? You have succeeded in making me read Broad’s quote a little differently, but I still think it was underpinned by a similar dry, pretension bursting intention as your own. My impression, from Farmelo’s account of him, is that Broad’s outlook was of the same school of thought as your own.
P: 341
 Quote by Ken Natton Ah yes yossel, an absolute masterpiece. I trust that I can expect to see your own version as your signature aphorism then? You have succeeded in making me read Broad’s quote a little differently, but I still think it was underpinned by a similar dry, pretension bursting intention as your own. My impression, from Farmelo’s account of him, is that Broad’s outlook was of the same school of thought as your own.
I agree - I actually felt guilty and cheap after posting that comment; in those days, for a certain kind of wry, independently-schooled Oxbridge academic, it wasn't unreasonable (sic) to speak in such a way.

Once I've worked out what my own aphorism actually says, if I find I agree with it, I may well include it as my signature.
 P: 272 Oh no, not at all yossell. I'm loath to take this discussion too far from the book about Dirac, but I do intend to post more about that when I've read it. I've already progressed a few chapters since this morning and it is deeply compelling. But meantime, let me make it clear. While Broad's comment gave me a wry inward smile, your's caused me to laugh out loud such that my wife wanted to know what I was laughing at. I then had to explain it to her knowing that there was no way she would have the faintest idea why I found it so funny. You've got a lot to answer for yossell.
 HW Helper P: 1,934 I made some comments on Dirac earlier to say that he made one contribution that seems to me quite unique: predicting from fundamental (though new) principles, and even aesthetic criteria, not just the behaviour of simple constituents of the world, but their existence. http://www.physicsforums.com/showpos...&postcount=146 The book suggests he and his time were right for each other and for this discovery, that later as well as earlier his style would not have (and did not) yield such dramatic results. (This could be said for Einstein too). From the book I now know another thing I would have had no way of guessing. He went to the same school and at the same time as Cary Grant. No a lot of people know that. Nor did they.