TSR Physics Society
Physics and electronics discussion, revision, exam and homework help.
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Re: TSR Physics SocietyHow do you know that by interacting, the originally photons have not changed into new photons?(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
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Re: TSR Physics SocietyYou 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).
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Re: TSR Physics SocietyYes, I agree, because I have been looking for a while, and only just found it. There seem to be plenty of people interested.(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.
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Re: TSR Physics SocietyI haven't seen him on much... can't you check from his last activity/ posts etc?(Original post by Princess Ana)
I agree. Does jpowell still come on much?
Edit: last activity 1 day ago, so he's still about. Maybe someone should PM him or something. else set it up on his behalfLast edited by F1 fanatic; 02-05-2006 at 01:14. -
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Re: TSR Physics SocietyGood luck then!(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.
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. -
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Re: TSR Physics Societyyeah good luck with those!(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.
Edit: Ana yes you can have as far as I am aware as many as you like. -
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Re: TSR Physics Society LogoWell 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.(Original post by M1N1)
Don't you think that's a bit of a strange comment for voting AGAINST Einstein???
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