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vf321
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Is information (in classical physics) transferred at light speed? Or is it assumed to be instantaneous? What is actually going on in examples such as:
1) An electron in space is surrounded by a capacitor which is connected to a closed circuit. Microsecond by microsecond, what happens?
If I have two perfectly rigid boxes, one behind the other, and I push one on the side on a frictionless floor, when will the other box know it's being pushed?
 2 years ago
 2 years ago
vf321 Group Title
Is information (in classical physics) transferred at light speed? Or is it assumed to be instantaneous? What is actually going on in examples such as: 1) An electron in space is surrounded by a capacitor which is connected to a closed circuit. Microsecond by microsecond, what happens? If I have two perfectly rigid boxes, one behind the other, and I push one on the side on a frictionless floor, when will the other box know it's being pushed?
 2 years ago
 2 years ago

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telltoamit Group TitleBest ResponseYou've already chosen the best response.0
i think its instantaneous
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
Assumed to be so or is?
 2 years ago

telltoamit Group TitleBest ResponseYou've already chosen the best response.0
thats what i think lol
 2 years ago

009infinity Group TitleBest ResponseYou've already chosen the best response.0
yes the information is rtansferred at the speed of light
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
really? So what would happen in the electron problem? The moment an atom of the metal in the switch touches the other side, the electron moves?
 2 years ago

009infinity Group TitleBest ResponseYou've already chosen the best response.0
first tell which type of current is in the circuit ac or dc
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
you have a battery (dc) of some EP hooked up to a switch and cap in series. an electron is in the space between the cap plates. You switch it on.
 2 years ago

009infinity Group TitleBest ResponseYou've already chosen the best response.0
electron will move towards +ve terminal
 2 years ago

009infinity Group TitleBest ResponseYou've already chosen the best response.0
instantaneous current will start flowing in circuit
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
assuming it's a perfect switch of course
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
You need 'stuff' to transfer information. No thing (no 'stuff') can travel faster than light, so no. AT BEST, information (about ANYTHING) travels AT the speed of light, never above.
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
That was the relativistic answer. Qunatum mechanics muddies the waters considerably (google quantum entanglement).
 2 years ago

009infinity Group TitleBest ResponseYou've already chosen the best response.0
is information ok
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
yeah @henpen I heard about that
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
But rereading the question, as long as you aren't doing electromagnetism you can approximate that it does.
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
eventually we'll have quantum computers with entangled memories  and finally no lag!
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
OK. so the current has to reach the capacitor, as I understand it.
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
An good example is about 4 mins into http://www.youtube.com/watch?v=Yi1H_9JOwkI
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
But what about the boxes example?
 2 years ago

009infinity Group TitleBest ResponseYou've already chosen the best response.0
other box will start accelerating as soon as ist box starts motion
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
Are all your questions to do with the original information question?
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
As in, do we assume that information can't travel faster than for that question?
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
@henpen I don't understand what you're saying. But I watched the video, and it seems to me that all forces can transfer their information at the speed of light (at most), since that information is transferred through the force's field particles (if I am not mistaken).
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
Then only quantum entanglement is the instantaneous one. And I'm not going to pretend to know how that works.
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
Basically, it's impossible to have a totally rigid body. If you have light year long scissors (even really strong), if you close then quickly they will bend.
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
okay then the stress/microscopic compressions in the first box will delay the force's movement across it by however much.
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
But is my assumption about the light speed of forces true?
 2 years ago

henpen Group TitleBest ResponseYou've already chosen the best response.1
Yes and Yes.
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
max speed of light speed*
 2 years ago

vf321 Group TitleBest ResponseYou've already chosen the best response.0
OK. Cool. that answers a lot, thanks!
 2 years ago
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