Physics is amazing!
Physics and electronics discussion, revision, exam and homework help.
-
- Reputation:
- Banned
- Posts: 1,430
Re: Physics is amazing!Agreed. I'd say that physics is better than sex. Although, being a physicist, I've been unable to test this hypothesis!
Anyway, what I want to work out is which area of physics is best. Generally the more rigorous the area, the larger one's own ego is, but then again, sometimes rigour ends with rigor mortis and the usefulness is sacrificed along with it. -
- Reputation:
- Exalted Member
- Posts: 361
Re: Physics is amazing!(Original post by 3nTr0pY)
Agreed. I'd say that physics is better than sex. Although, being a physicist, I've been unable to test this hypothesis!
Best thing i've read all year
-
- Reputation:
- Banned
- Posts: 3,151
Re: Physics is amazing!Hello Dr. Sheldon Cooper.(Original post by 3nTr0pY)
Agreed. I'd say that physics is better than sex. Although, being a physicist, I've been unable to test this hypothesis!
Anyway, what I want to work out is which area of physics is best. Generally the more rigorous the area, the larger one's own ego is, but then again, sometimes rigour ends with rigor mortis and the usefulness is sacrificed along with it. -
- Reputation:
- Exalted and Worshipped Member
- Posts: 1,389
Re: Physics is amazing!A guy on my course did a spoof video about himself for a uni film competition. He went into his room saying 'This is where the magic happens. No, not sex - physics is more important.'(Original post by 3nTr0pY)
Agreed. I'd say that physics is better than sex. Although, being a physicist, I've been unable to test this hypothesis!
One of my friends on my course complained that he'd gone a week without sex. I told him to shut up because he was surrounded by a large crowd of physicists. -
- Reputation:
- Banned
- Posts: 1,430
Re: Physics is amazing!Physics is better than sex because mathematical theorems are perfect whereas no woman can ever be
Also, most of the women I go out with barely know Noether's theorem let alone quantum field theory or combinatorial set theory.
Don't tell me about that second rate, mediocre mind who continues to puff himself up like a blowfish. To even be mentioned in the same sentence as that vacuous oaf I find simultaneously hilarious and offensive. Indeed his pathetic nature is a quantum superposition of embarrassment.(Original post by . . .)
Hello Dr. Sheldon Cooper.
Finally, a man with some sense. A girl once asked me back to her room so that we could try some physics together. Almost fell for it until I realised that bitch was a medic.(Original post by SmallTownGirl)
A guy on my course did a spoof video about himself for a uni film competition. He went into his room saying 'This is where the magic happens. No, not sex - physics is more importantLast edited by 3nTr0pY; 29-06-2012 at 13:20. -
- Reputation:
- Overlord in Training
- Location: London
Re: Physics is amazing!It's always nice to see two beautiful theories merging together seamlessly. I only took the introductory course to QFT so we only covered the canonical quantization approach and not the path integral formulation. Most of the course was just learning the tools so looking at toy models but at the end we did see how the QED Lagrangian comes about so smoothly by combining the Maxwell and Dirac Lagrangians which then give all the required properties via Noether(Original post by 3nTr0pY)
Dammit. Ok, I lied. Haven't done QFT yet.
Will agree on Noether though!
So what in particular do you enjoy about QFT?
-
- Reputation:
- Banned
- Posts: 1,430
Re: Physics is amazing!Cool, I will have to learn that!(Original post by suneilr)
It's always nice to see two beautiful theories merging together seamlessly. I only took the introductory course to QFT so we only covered the canonical quantization approach and not the path integral formulation. Most of the course was just learning the tools so looking at toy models but at the end we did see how the QED Lagrangian comes about so smoothly by combining the Maxwell and Dirac Lagrangians which then give all the required properties via Noether
I think I may have to do it in my spare time though as I don't think I am able to fit a whole course on it in. Recently I've been leaning towards less rigorous more phenomenological courses as I tend to grasp things more clearly if I understand things in a physical, rather than mathematical way.
I still firmly believe that both methods are key...which is why I worry about string theory (if the rumours are true that is, I've not studied it). -
- Reputation:
- Overlord in Training
- Location: London
Re: Physics is amazing!Most of Quantum is just a mathematical framework. In QFT the fields themselves don't have any physical meaning ( I think) as they're operator valued fields. The important thing is the S-Matrix which allows you to calculate the amplitudes for different scattering events (so for HEP for example).(Original post by 3nTr0pY)
Cool, I will have to learn that!
I think I may have to do it in my spare time though as I don't think I am able to fit a whole course on it in. Recently I've been leaning towards less rigorous more phenomenological courses as I tend to grasp things more clearly if I understand things in a physical, rather than mathematical way.
I still firmly believe that both methods are key...which is why I worry about string theory (if the rumours are true that is, I've not studied it).
I had a glance at a review of QFT in a curved spacetime, and it's pretty crazy. It seems that accelerating observers see a different number of particles to inertial observers. The vacuum state for one observer might not even exist in the space of quantum states of another observer! -
- Reputation:
- Banned
- Posts: 1,430
Re: Physics is amazing!It's cool that you are so excited about it already then. It will probably take you another 5 years of study before you can seriously approach QFT but there's so much awesome physics before that that makes it worth the effort.(Original post by AdamFenton)
I will be honest here guys, I have no idea what QFT and quantum theory is. I am only 16, just finished my GCSE's but I am taking it at A level and really looking forward to it!
Crazy. You need an open mind to deal with this stuff - although not so open that your brain falls out!Most of Quantum is just a mathematical framework. In QFT the fields themselves don't have any physical meaning ( I think) as they're operator valued fields. The important thing is the S-Matrix which allows you to calculate the amplitudes for different scattering events (so for HEP for example).
I had a glance at a review of QFT in a curved spacetime, and it's pretty crazy. It seems that accelerating observers see a different number of particles to inertial observers. The vacuum state for one observer might not even exist in the space of quantum states of another observer! -
- Reputation:
- Full Member
- Posts: 126
Re: Physics is amazing!I cried(Original post by 3nTr0pY)
Agreed. I'd say that physics is better than sex. Although, being a physicist, I've been unable to test this hypothesis!
As for which area I find best, QED, Special relativity and electromagnetism are all pretty amazing; the first two are so different from what you experience in everyday life and yet describes the world incredibly accurately; and the latter for explaining such a wide range of stuff - aurora, induction, light etc. -
- Reputation:
- Overlord in Training
- Location: Alagaësia
- Posts: 3,492
Re: Physics is amazing!I have conducted some scientific experiments into this area, and can confirm that your hypothesis(Original post by 3nTr0pY)
Agreed. I'd say that physics is better than sex. Although, being a physicist, I've been unable to test this hypothesis!
Anyway, what I want to work out is which area of physics is best. Generally the more rigorous the area, the larger one's own ego is, but then again, sometimes rigour ends with rigor mortis and the usefulness is sacrificed along with it.appears to be correctis 100% correct. What shall you be naming your new found theorem?
Last edited by Oromis263; 04-07-2012 at 00:31. -
- Reputation:
- Exalted and Worshipped Member
- Location: Manchester, UK
- Posts: 1,039
Re: Physics is amazing!Damn, beat me to it!(Original post by . . .)
Hello Dr. Sheldon Cooper. -
- Reputation:
- Overlord in Training
- Location: London
Re: Physics is amazing!I always found the maths to be much more fascinating(Original post by 3nTr0pY)
It's cool that you are so excited about it already then. It will probably take you another 5 years of study before you can seriously approach QFT but there's so much awesome physics before that that makes it worth the effort.
Crazy. You need an open mind to deal with this stuff - although not so open that your brain falls out!
Everything that is physics just falls out from the maths - Charge conservation, energy and momentum conservation etc are all just Noether's Theorem...
