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# TSR Physics Society Tweet

Physics and electronics discussion, revision, exam and homework help.

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1. Re: TSR Physics Society
I want to join plz. Gamow and Fermi were just as good lecturers as Feynman, it should be said. HEE HEE HEE.
2. Re: TSR Physics Society
(Original post by AlphaNumeric)
The thing is, can you definitely tell me they have annihiliated and then produced two entirely new photons, or have they just interacted, altering some of their characteristics? Given these characteristics are all you can know about photons, it doesn't matter which mechanism you think is true, the outcome is the same
How do you know that by interacting, the originally photons have not changed into new photons?
3. Re: TSR Physics Society
You don't, they are the same particle type and you can only define photons by their particle type, polarisation and momentum. Since the particle type doesn't change you have no method of differentiating between new photons and altered photons.

However, you might gain some insight into it by considering possible Feynman scattering. By conservation of spin I don't think you can have two photons combining into a single photon. Therefore lowest order scattering is photons interacting with one another. You can however get a infinitely many more complex fermion loops, where the photons turn into particle/antiparticle pairs, then back into new photons. In that case the photons were destroyed, then converted back.

It would seem we're both right, just it depends on the coupling force of electromagnetism Your scatterings are O(e[sup]2[/sup), mine is O(1).
4. Re: TSR Physics Society
Is this ever going to be made into a proper society? as in with logos and the like... a lot of people probably don't know of its existence.
5. Re: TSR Physics Society
(Original post by F1 fanatic)
Is this ever going to be made into a proper society? as in with logos and the like... a lot of people probably don't know of its existence.
Yes, I agree, because I have been looking for a while, and only just found it. There seem to be plenty of people interested.

PK
6. Re: TSR Physics Society
I agree. Does jpowell still come on much?
7. Re: TSR Physics Society
(Original post by Princess Ana)
I agree. Does jpowell still come on much?
I haven't seen him on much... can't you check from his last activity/ posts etc?

Edit: last activity 1 day ago, so he's still about. Maybe someone should PM him or something. else set it up on his behalf
Last edited by F1 fanatic; 02-05-2006 at 01:14.
8. Re: TSR Physics Society
I've got 3rd year uni exams to worry about at the moment. I don't mind if someone else sets up the society though.
9. Re: TSR Physics Society
(Original post by jpowell)
I've got 3rd year uni exams to worry about at the moment. I don't mind if someone else sets up the society though.
Good luck then!

Alright, shall we do that?

Someone needs to find us a logo first....

...and then we should decide who other than jpowell should be leaders (you *can* have more than one, can't you?)
Last edited by Ana; 02-05-2006 at 11:10.
10. Re: TSR Physics Society
(Original post by jpowell)
I've got 3rd year uni exams to worry about at the moment. I don't mind if someone else sets up the society though.
yeah good luck with those!

Edit: Ana yes you can have as far as I am aware as many as you like.
11. Re: TSR Physics Society
My logo suggestions from last July (such is the length of time we have been meaning to do this!)

Galaxy

Nebula

Obviously they would need rescaling
12. Re: TSR Physics Society
Prefer Feynman to Einstein!
13. Re: TSR Physics Society
(Original post by teachercol)
Prefer Feynman to Einstein!
Find a pic of Feynman then
14. Re: TSR Physics Society
oooh a physics society, i want in. (If no one minds of course )

EDIT: and i would vote for einstein if a vote is done
15. TSR Physics Society Logo
Just to see who would like a picture of what for the society, not deciding on a specific picture, after a short dispute about whether we should have Feynman or Einstein.

PK
16. Re: TSR Physics Society Logo
Feynman for being one of the greatest physicists of all time.
17. Re: TSR Physics Society Logo
(Original post by suneilr)
Feynman for being one of the greatest physicists of all time.
Don't you think that's a bit of a strange comment for voting AGAINST Einstein???
18. Re: TSR Physics Society Logo
(Original post by M1N1)
Don't you think that's a bit of a strange comment for voting AGAINST Einstein???
Well Einstein was a good physicist however his rejection of quantum theory in spite of the evidence means that I see Feynman as a better physicist. Plus Feynman has really simplified our understanding of the physical world.
19. Re: TSR Physics Society
Ooh can i join please? And definately Feynman
20. Re: TSR Physics Society
BTW, in case anyone hadn't noticed, I've started a poll on the logo of the society.