Timeline for Why photon and electrons travel at same speed in thunder
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 24, 2018 at 2:26 | comment | added | Gurbir Singh | @JEB can we see electrons with our eyes? I am astonished! | |
| Feb 23, 2018 at 17:28 | comment | added | aneesh cool | I also have another doubt.Is it bcoz there is more oxygen near the earth's surface that gravity is also high.Or is it just the air molecules that puts that much force on us which we call it "gravity"???? | |
| Feb 23, 2018 at 17:21 | comment | added | JEB | @aneeshcool Light moves at 0.9997c in air, so an electron faster than that emits about 30 photons per meter in a forward cone. These hit a mirror and are focus on a photomultiplier tube (PMT)-which then convert 20% of them (hence 6 per meter in the OC) into electrons which are accelerated and multiplied in to a roughly 20 ns pulse, which is then observed on a oscilloscope or captured with an ADC for further analysis. | |
| Feb 23, 2018 at 16:56 | comment | added | Mike Dunlavey | Photons move more slowly in any material than they do in a vacuum. That's how lenses work. | |
| Feb 23, 2018 at 16:51 | vote | accept | aneesh cool | ||
| Feb 23, 2018 at 16:49 | answer | added | Mike Dunlavey | timeline score: 2 | |
| Feb 23, 2018 at 16:44 | comment | added | aneesh cool | @JEB how does electrons look like??..can we achieve time machine?? | |
| Feb 23, 2018 at 16:42 | comment | added | JEB | @GurbirSingh I have seen electrons travel faster than photons in air with my own eyes (well, PMTs)--all it takes is 21 MeV to make Cherenkov light--about 6 photons per meter, max. | |
| Feb 23, 2018 at 16:28 | comment | added | aneesh cool | Now I get it..thanks.But is it the real reason?? | |
| S Feb 23, 2018 at 16:25 | history | suggested | Rob | CC BY-SA 3.0 |
Removed "faster-than-light" Tag. Added relevant Tags. Split one paragraph into premise, beliefs, question. Corrected spelling and grammar.
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| Feb 23, 2018 at 16:22 | answer | added | Nathaniel Barnhill | timeline score: 0 | |
| Feb 23, 2018 at 16:21 | comment | added | Javier | The electrons move inside the lightning. They move slowly, but there are a lot of them; this is what hurts. The light from the lightning, however, moves away very fast. | |
| Feb 23, 2018 at 16:07 | review | Suggested edits | |||
| S Feb 23, 2018 at 16:25 | |||||
| Feb 23, 2018 at 15:56 | comment | added | aneesh cool | Then why do people die when they get struck by a lightening??. | |
| Feb 23, 2018 at 15:53 | comment | added | Gurbir Singh | The electrons don't come to you. It is only the light from them. | |
| Feb 23, 2018 at 15:52 | comment | added | aneesh cool | Yes but during lightning we see a light that strikes the earth.That lightning is electrons ryt?? .It comes along with the photon.Iam sry it is doubt I have in my mind | |
| Feb 23, 2018 at 15:49 | comment | added | Gurbir Singh | Who said that? Electrons can never reach speed of photons. For that they must be massless which they are not. | |
| Feb 23, 2018 at 15:46 | history | asked | aneesh cool | CC BY-SA 3.0 |