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/sci/ - Science & Math

File: 843 KB, 1259x709, e-mu.png [View same] [iqdb] [saucenao] [google]

9279185

Anonymous Mon Nov 6 10:37:09 2017 No.9279185 [Reply] [Original]

what is this?

>>	Anonymous Mon Nov 6 10:39:10 2017 No.9279187 >>9279185 One of Fynemans things I believe. He was ridiculed at first for that. I've seen it on that sitcom as well

>>	Anonymous Mon Nov 6 10:45:45 2017 No.9279191 >>9279187 >Fynemans

>>	Anonymous Mon Nov 6 10:53:30 2017 No.9279203 >>9279185 Two electrons colliding and producing a photon and two muons? Am I reading that right?

>>	Anonymous Mon Nov 6 10:56:27 2017 No.9279209 >>9279203 Electron and muon bouncing off each other exchanging a virtual photon in the process. Check the time axis on the right.

>>	Anonymous Mon Nov 6 11:04:01 2017 No.9279227 >>9279209 Ah, and the vector arrows would help too.

>>	Anonymous Mon Nov 6 11:06:38 2017 No.9279231 >>9279227 The arrows can be misleading when you start to incorporate antimatter and stuff, because they can be shown as backwards matter. Best to remember that the diagrams always go bottom to top.

>>	Anonymous Mon Nov 6 11:09:44 2017 No.9279233 File: 228 KB, 1272x1261, Capture+_2017-11-06-11-09-03.png [View same] [iqdb] [saucenao] [google] >>9279231 Usually go bottom to top anyway.... There will be a time axis if not. But yeah, don't use the vectors.

>>	Anonymous Mon Nov 6 11:11:14 2017 No.9279235 >>9279185 It's an emu. A large, flightless bird native to Australia.

>>	Anonymous Mon Nov 6 12:16:20 2017 No.9279335 I've show you a book on ABC theory you can buy. It's technical when you need it to be and not much more. Used it for intro grad school, but honestly you could use it once you knew multivariate and maybe a little linear

>>	Anonymous Mon Nov 6 12:18:14 2017 No.9279340 >>9279233 Buddy these things happen at the same instant in time, no time eclipses. The whole time analogy is just so you initially don't freak at math and overthink it.

>>	Anonymous Mon Nov 6 12:28:49 2017 No.9279355 >>9279340 There is clearly an order of events going on here. The direction of time flow is essential to the diagram. It's in an instant yes, so the axis doesn't need labels, but the time direction is important.

>>	Anonymous Mon Nov 6 12:36:59 2017 No.9279364 File: 124 KB, 1409x1080, 1424634502225.jpg [View same] [iqdb] [saucenao] [google] >>9279187 >Fynemans things

>>	Anonymous Mon Nov 6 14:11:05 2017 No.9279578 File: 713 KB, 512x768, absolute.png [View same] [iqdb] [saucenao] [google] >>9279187 >"Fynemans things"

>>	Anonymous Mon Nov 6 15:37:12 2017 No.9279775 >>9279340 Simultaneity is relative. There is no absolute simultaneity, especially at relativistic speeds. Every teenager who has completed high-school survey of special relativity knows that.

>>	Anonymous Mon Nov 6 15:41:42 2017 No.9279780 It's a scene in big bang theory

>>	Anonymous Mon Nov 6 15:44:43 2017 No.9279785 Wtf is that integral? t. Knows quantum mechanics.

>>	Anonymous Mon Nov 6 15:49:08 2017 No.9279795 >muh series expansion >>9279785 It's a momentum space integral over the virtual photon. But this diagram is really simple, since momentum conservation at the vertex fixes what q can be. >>9279187 >he was ridiculed No he was not.

>>	Anonymous Tue Nov 7 00:08:49 2017 No.9280534 >>9279185 It's an illusion. The line appears longer because of the orientation of the arrows

>>	Anonymous Tue Nov 7 00:10:24 2017 No.9280537 >>9279185 It's reverse polish notation. You can immediately see why HP calculators are so wonderful to use. It is 1+1