Linked Questions

6
votes
4answers
3k views

What does observation mean in two-slit electron diffraction experiment? [duplicate]

My question is clear, that I ask: What do we mean by "observation" in 2-slit experiment for electrons (or any other wave-particle)? You know, we say that :"if we observe the electron, it shows a ...
7
votes
2answers
689 views

What does it mean to observe? [duplicate]

This is a layman's question. The only thing I know about quantum physics is from casual reading and documentaries. I can imagine electrons being probabilistic waves. Their position is an infinite ...
1
vote
0answers
78 views

What exactly constitutes a measurement? [duplicate]

As far as I understand it, quantum mechanics only predicts the probabilities of finding a system in some state of some observable when we make a measurement. So, what exactly constitutes a ...
22
votes
6answers
3k views

Is there a difference between observing a particle and hitting it with another particle?

First, let me state that I'm a lot less experienced with physics than most people here. Quantum mechanics was as far as I got and that was about 9 years ago, with no use in the meantime. A lot of ...
4
votes
3answers
459 views

What is a measurement in the Many Worlds Interpretation?

I was reviewing the MWI, and couldn't figure what a measurement is in the MWI? Everett claims that split happens when you measure, but what is it for MWI (not for general QM)? Yes, I know about ...
2
votes
1answer
2k views

What are observables? [closed]

What are observables and how are they related to quantum decoherence and wavefunction collapse. I read this: Observables - what are they? but it was about the technical details on observables. Even ...
2
votes
2answers
533 views

Differences in measurement between quantum physics and classical physics?

I know that there are differences in measurement due to quantisation, probability, and collapse in quantum physics, but I am having trouble explaining how these ideas relate to measurement in an ...
2
votes
1answer
419 views

Thought Experiment: Force on magnets in a Stern Gerlach Experiment

Background: In the SG experiment, an inhomogenous magnetic field affects a force on particles passing between two magnets. "Measurement" takes place when a screen is placed on one end, blocking one ...
4
votes
2answers
71 views

Questions about Schrodinger's cat [duplicate]

While I was listening to my teacher present the basic idea's of Schrodinger's famous thought experiment, he said that because we can not SEE the cat, the cat exists in some sort of position in which ...
0
votes
2answers
157 views

Why do lasers in open air produce 2-slit interference patterns? [closed]

I saw this answer: Is quantum entanglement functionally equivalent to a measurement?. I had follow up questions that seem to have been addressed. Here are just a few similar topics: Why does ...
1
vote
0answers
73 views

If measurement cause collapse of wave function, does it mean that any other interactions also collapse wave function? [duplicate]

I searched through many discussion on Physics Stack Exchange about "Why observation cause collapse of wave function?" and I am totally confused. Is it already solved by modern quantum physics? I know ...