Activity for Fred Wamsleyâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #293488 | Initial revision | — | about 2 months ago |
| Answer | — |
A: Why is it forbidden for two photons to turn into one? With Maxwell's equations being linear and superposition working, isn't there no mechanism (in free space) for photons to interact? (Well, there's gravity: https://en.wikipedia.org/wiki/Geon(physics)) (more) |
— | about 2 months ago |
| Edit | Post #293259 | Initial revision | — | 3 months ago |
| Question | — |
Would EMP from a supernova be dangerous a few light years out? Nuclear explosions create electromagnetic pulses which are a hazard to electronics. Would someone a few star systems over from a core collapse supernova be in danger? A quick search turned up only one paper on the subject, https://adsabs.harvard.edu/full/1975ApJ...198..439C, which was from long... (more) |
— | 3 months ago |