anonymous
  • anonymous
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?
Physics
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
i think its instantaneous
anonymous
  • anonymous
Assumed to be so or is?
anonymous
  • anonymous
thats what i think lol

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anonymous
  • anonymous
yes the information is rtansferred at the speed of light
anonymous
  • anonymous
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?
anonymous
  • anonymous
first tell which type of current is in the circuit ac or dc
anonymous
  • anonymous
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.
anonymous
  • anonymous
electron will move towards +ve terminal
anonymous
  • anonymous
instantaneous current will start flowing in circuit
anonymous
  • anonymous
assuming it's a perfect switch of course
anonymous
  • anonymous
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.
anonymous
  • anonymous
That was the relativistic answer. Qunatum mechanics muddies the waters considerably (google quantum entanglement).
anonymous
  • anonymous
is information ok
anonymous
  • anonymous
yeah @henpen I heard about that
anonymous
  • anonymous
But rereading the question, as long as you aren't doing electromagnetism you can approximate that it does.
anonymous
  • anonymous
eventually we'll have quantum computers with entangled memories - and finally no lag!
anonymous
  • anonymous
OK. so the current has to reach the capacitor, as I understand it.
anonymous
  • anonymous
An good example is about 4 mins into http://www.youtube.com/watch?v=Yi1H_9JOwkI
anonymous
  • anonymous
But what about the boxes example?
anonymous
  • anonymous
other box will start accelerating as soon as ist box starts motion
anonymous
  • anonymous
Are all your questions to do with the original information question?
anonymous
  • anonymous
As in, do we assume that information can't travel faster than for that question?
anonymous
  • anonymous
@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).
anonymous
  • anonymous
Then only quantum entanglement is the instantaneous one. And I'm not going to pretend to know how that works.
anonymous
  • anonymous
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.
anonymous
  • anonymous
okay then the stress/microscopic compressions in the first box will delay the force's movement across it by however much.
anonymous
  • anonymous
But is my assumption about the light speed of forces true?
anonymous
  • anonymous
Yes and Yes.
anonymous
  • anonymous
max speed of light speed*
anonymous
  • anonymous
OK. Cool. that answers a lot, thanks!

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