Filosofi!
Hittade en inofficiell förklaring lite snabbt efter lat sökning
Observation is equivalent with gaining information. The photon or electron can only interfere fully (and thus display wave-like properties) when there is zero information available to an observer about which slit the particle passed through.
An observation can now be set up to extract anything in between zero and the one full bit encoded in the particle's position. Once you have the full bit, you will know where the electron passed through and it will thus not be able to generate a wave pattern. You can only extract half a bit though, by doing a clever measurement, and then you'll get the photon to act to 50% as a wave and to 50% as a particle.
Also:
Observation doesn't mean "someone looking at it."
Observation is literally the collapse of the wave function into one possible state.
Ska kolla lite kul saker när jag är hemma!
Sitter för tillfället på ett tåg med mobilen i handen!
Citat från BloodBath
Ska kolla lite kul saker när jag är hemma!
Sitter för tillfället på ett tåg med mobilen i handen!
Jag fick höra talas om just det experimentet vi snackar om första gången när jag satt på ett tåg bredvid en kille som läste en bok om bland annat det. Vi började snacka och han visade mig det experimentet bland annat. Var lite coolt.
Så typ... SNACKA MED FOLK MED BÖCKER PÅ TÅGET
I princip snackar de om elektronens förmåga att teoretiskt existera i alla dess former samtidigt, och att vi inte har förmågan/viljan (?) att se alla dessa former, utan en åt gången. När du har tid kan du ge mig en full bild av argumentet så att jag kan vira min hjärna runt det.
EDIT: Glömde att tacka!
Nej, när vi "observerar" det så "interferar" vi med det, och påverkar utfallet. Vi kan inte bara "se" det, vi måste använda instrument för att kunna pinpointa vad exakt det är vi ser, och för att göra det måste vi I PRINCIP använda en uteslutningsmetod, vilket påverkar utfallet, om jag fattat det rätt.
---
When we say observation, what we really mean is interaction - we observe a particle by measuring its position, in this case we would up a beam splitter and a photo detector or some such machinery at one or each of the slits. We would then know which slit any given photon went through since they would interact with the detectors.
By interacting with the particles like that, it is a given the particle was at the measured position at the time we measured it - it could be nowhere else. That means the photon has a well defined direction of movement, it went from the source to the slit and must continue along that same path until it ends up as a splat on the wall.
If we remove our detectors from the slits, and shoot photons through again, a photon that is emitted from the source can go anywhere, and in fact it has the same probability of going through either slit as they are symmetric - this is where quantum mechanics get a bit weird because in fact the photon will go partly through both slits which in turn will act as 2 sources, creating interference with each others emitted waves.
The waves they "emit" can be considered probability densities - so where these waves have a high amplitude you have a high probability of the photon ending up, on the other hand where they extinguish each other there is 0 probability of the photon ever ending up.
http://en.wikipedia.org/wiki/Observer_effect_%28physics%29
In physics, the term observer effect refers to changes that the act of observation will make on the phenomenon being observed. This is often the result of instruments that, by necessity, alter the state of what they measure in some manner. A commonplace example is checking the pressure in an automobile tire; this is difficult to do without letting out some of the air, thus changing the pressure. This effect can be observed in many domains of physics.
Edit: hade kanske inget med något att göra.
Får brottas med den här tankegången att tag, tack båda!
Citat från sattyg
http://en.wikipedia.org/wiki/Observer_effect_%28physics%29
In physics, the term observer effect refers to changes that the act of observation will make on the phenomenon being observed. This is often the result of instruments that, by necessity, alter the state of what they measure in some manner. A commonplace example is checking the pressure in an automobile tire; this is difficult to do without letting out some of the air, thus changing the pressure. This effect can be observed in many domains of physics.
Edit: hade kanske inget med något att göra.
Tycker faktiskt detta verkar rätt uppenbart ändå? :(
Citat från BloodBath
Tycker faktiskt detta verkar rätt uppenbart ändå? :(
Tror förvirringen ligger i att observation inom vetenskapen inte betyder riktigt samma sak som observation i vardagen
Det misstaget har ju varit som ved i elden för hur många new age-hippies som helst.
"Like, if you think about the universe, you can change it! It's like...uhm...quantum physics and stuff!"
Quantum healing!
Filosofi är sjukt spännande!
Är det någon här som pluggar filosofi?
Jag tänker nog börja HT13..
Du måste vara inloggad för att skriva i forumet