Timeline for Does it contradict special relativity that an electron beam in a television picture tube can move across the screen faster than the speed of light?
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| Jul 12, 2023 at 3:46 | answer | added | Selene Routley | timeline score: 2 | |
| Jan 8, 2017 at 11:58 | answer | added | b_jonas | timeline score: 1 | |
| Jan 8, 2017 at 11:39 | comment | added | b_jonas | Wait, are you sure? I thought an electron beam in a television moves with less than 10^6 m/s speed usually, so nowhere near at the speed of light. | |
| Jan 8, 2017 at 10:36 | answer | added | Selene Routley | timeline score: 2 | |
| Aug 11, 2016 at 18:46 | history | edited | Qmechanic♦ | CC BY-SA 3.0 |
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| Nov 24, 2012 at 15:11 | history | edited | Waffle's Crazy Peanut | CC BY-SA 3.0 |
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| Jul 17, 2011 at 22:26 | comment | added | kuzand | @ Bernhard Heijstek, Cherenkov radiation is a completely different phenomenon. There the electrons are moving faster than the speed of light in matter, not in vacuum. | |
| Jul 17, 2011 at 22:10 | answer | added | kuzand | timeline score: 1 | |
| Jul 10, 2011 at 13:34 | comment | added | Bernhard Heijstek | Relevant: en.wikipedia.org/wiki/Cherenkov_radiation | |
| Dec 30, 2010 at 8:38 | vote | accept | wrongusername | ||
| Dec 29, 2010 at 6:32 | answer | added | Colin K | timeline score: 21 | |
| Dec 28, 2010 at 23:47 | comment | added | David Z | @GregP: en.wikipedia.org/wiki/Superluminal_motion has some descriptions of common examples. Although that might be a good question to ask on the site. | |
| Dec 28, 2010 at 22:35 | comment | added | Greg P | There were some other 'paradoxes' where objects seem to move at superluminal speeds. Particularly one from astrophysics which seemed interesting...perhaps someone can remember it for me. | |
| Dec 28, 2010 at 22:31 | comment | added | Greg P | Yes. It is something I remember from an intro relativity book. It means the actual spot (yes, the image) moving across the screen. Otherwise, I don't get the point of the question. The electrons themselves don't move faster than light. It is just an illusion of something moving faster than the speed of light. | |
| Dec 28, 2010 at 22:21 | comment | added | wrongusername | @Greg oh! move across the screen... so is it talking about the picture itself? I thought it was saying the beam from the electron gun was moving faster than light | |
| Dec 28, 2010 at 22:17 | comment | added | Greg P | You could also just consider a person shining a laser pointer at a distant wall. As you spin around, the spot of the laser pointer moves on the wall with a speed dependent on the distance to the wall. In principle, the wall could be so far away that the spot moves faster than the speed of light. But the light is still moving at the speed of light (in air, or whatever). The spot is not really an object - unless you are the inmate trying to escape from the insane asylum on a beam of light! | |
| Dec 28, 2010 at 22:05 | history | edited | wrongusername | CC BY-SA 2.5 |
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| Dec 28, 2010 at 22:05 | answer | added | Omega Centauri | timeline score: 9 | |
| Dec 28, 2010 at 21:59 | history | asked | wrongusername | CC BY-SA 2.5 |