Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
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?
 one year ago
 one year ago
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?
 one year ago
 one year ago

This Question is Closed

telltoamitBest ResponseYou've already chosen the best response.0
i think its instantaneous
 one year ago

telltoamitBest ResponseYou've already chosen the best response.0
thats what i think lol
 one year ago

009infinityBest ResponseYou've already chosen the best response.0
yes the information is rtansferred at the speed of light
 one year ago

vf321Best 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?
 one year ago

009infinityBest ResponseYou've already chosen the best response.0
first tell which type of current is in the circuit ac or dc
 one year ago

vf321Best 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.
 one year ago

009infinityBest ResponseYou've already chosen the best response.0
electron will move towards +ve terminal
 one year ago

009infinityBest ResponseYou've already chosen the best response.0
instantaneous current will start flowing in circuit
 one year ago

vf321Best ResponseYou've already chosen the best response.0
assuming it's a perfect switch of course
 one year ago

henpenBest 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.
 one year ago

henpenBest ResponseYou've already chosen the best response.1
That was the relativistic answer. Qunatum mechanics muddies the waters considerably (google quantum entanglement).
 one year ago

vf321Best ResponseYou've already chosen the best response.0
yeah @henpen I heard about that
 one year ago

henpenBest 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.
 one year ago

vf321Best ResponseYou've already chosen the best response.0
eventually we'll have quantum computers with entangled memories  and finally no lag!
 one year ago

vf321Best ResponseYou've already chosen the best response.0
OK. so the current has to reach the capacitor, as I understand it.
 one year ago

henpenBest ResponseYou've already chosen the best response.1
An good example is about 4 mins into http://www.youtube.com/watch?v=Yi1H_9JOwkI
 one year ago

vf321Best ResponseYou've already chosen the best response.0
But what about the boxes example?
 one year ago

009infinityBest ResponseYou've already chosen the best response.0
other box will start accelerating as soon as ist box starts motion
 one year ago

henpenBest ResponseYou've already chosen the best response.1
Are all your questions to do with the original information question?
 one year ago

henpenBest ResponseYou've already chosen the best response.1
As in, do we assume that information can't travel faster than for that question?
 one year ago

vf321Best 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).
 one year ago

vf321Best 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.
 one year ago

henpenBest 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.
 one year ago

vf321Best 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.
 one year ago

vf321Best ResponseYou've already chosen the best response.0
But is my assumption about the light speed of forces true?
 one year ago

vf321Best ResponseYou've already chosen the best response.0
max speed of light speed*
 one year ago

vf321Best ResponseYou've already chosen the best response.0
OK. Cool. that answers a lot, thanks!
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.