Linked Questions

10
votes
8answers
5k views

What exactly is the 'observer' in physics and/or quantum mechanics? [duplicate]

Possible Duplicate: nature of an observer For instance, in the double slit experiment, what is exactly defined as an observer? I remember from somewhere, light is also an observer?
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
693 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 ...
2
votes
2answers
931 views

Do our eyes act as observers at the quantum level? [duplicate]

This is a very high level question. I was just thinking about the idea than in quantum physics, the act of observing has a "strange" effect on some properties (e.g. double slit). If I'm staring at a ...
-1
votes
1answer
244 views

Observation effect in double slit experiment [duplicate]

I have watched some of the lectures given by Brian Greene and Lawrence Krauss about the observation conundrum encountered during the double slit experiment. Can anybody answer me this question? Is ...
4
votes
2answers
72 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 ...
1
vote
1answer
223 views

How do we observe an electron? [duplicate]

When an electron is observed it acts like a particle and its wave function collapse. This statement is very famous in quantum mechanics, but what is meant by observing an electron? Which devices are ...
0
votes
1answer
161 views

The observer effect, how is related to death of human brain or consciousness? [duplicate]

Are we just a measurement device that interacts with quantum wave function/photons or something more? if not then can we die/be destroyed as observer?
3
votes
2answers
53 views

Quantum mechanics what do they mean by observing? [duplicate]

In quantum mechanics, you usually hear the phrase "the act of observing the state modifies it", but they never really define what they mean by "observing". For example, suppose we ...
2
votes
1answer
91 views

What is an observer that is not a whole living human person? [duplicate]

In current quantum models, name one or more objects that collapse an entangled waveform into a single classical particle other than a complete living human person. The "duplicate" I just read has an ...
0
votes
1answer
114 views

What is an “observer” in quantum mechanics? [duplicate]

i read about the electrons double slit experiment, when both slits are open, electrons will form an interference pattern, but when there is a detector put to "observe" this weird behaviour, the ...
0
votes
2answers
104 views

Definition of an “Observer” in regards to quantum physics and consciousness involvement [duplicate]

Each time I look video in regards to quantum physics there is almost always one point where they claim small matter can be represented by a wave function (can be everywhere but the item in question ...
0
votes
0answers
87 views

What is an “observer” really? [duplicate]

Possible Duplicate: What is an observer in quantum mechanics? I'm sick of quantum physics explanations which term experiments where the outcome depends on "if you observe it or not". For example, ...
4
votes
0answers
56 views

What does it mean 'the observer' in Quantum Physics? [duplicate]

Is it only necessary a human consciousness? A measurement device? Can it be said that any of them cause the wave function collapse?
2
votes
1answer
51 views

How to draw a line between observation and minds? [duplicate]

When talking about quantum mechanics, a lot of people make the (pseudo-scientific?) argument that minds are required to collapse the wave function (and therefore, minds are important, we are back on ...
1
vote
0answers
48 views

In Quantum Physics would a camera count an observer that causes wave collapse? [duplicate]

Would the observation from a camera have the same effect on wave function as the observation from a living being?
2
votes
2answers
318 views

What does this quantum experiment says about quantum world?

I am complete noob so please bear with me. I always read that in quantum world things exists as probability and only become one when they are observed...or wave collapses into particle. But there was ...
3
votes
3answers
755 views

Wave function collapse and Schrodinger's equation without measurement

Will wave function collapse without measurement? Since all matters are described by wave functions, then in principle, I should be able to describe wave function collapse by Schrodinger's equation. (...
3
votes
3answers
548 views

The observer detail of double slit experiment

I have been searching internet for a while and I couldn't find any detailed information about the observer type in double slit experiment of electrons. For example is the observer a camera or ...
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 ...
0
votes
1answer
109 views

In QM does the observer really perturb the system to make a measurement?

It is commonly taught in introductory QM courses that in order to get to know the position or momentum of a particle, be it by "sending a photon" or similar experiments, the measurement necessarily ...
0
votes
2answers
70 views

Does the observation instrument need to be conscious in order to change the interference pattern in the “Double slit experiment”? [closed]

I am an absolute amateur in physics but some questions haunt us all, don't they? In some places I hear/read that the conscious observer changes the pattern (https://youtu.be/XDpurdHKpb8?t=1559). In ...
0
votes
1answer
68 views

If the only observer dies, could observer 2 ever have see a different result?

My layman's understanding of QFT is that once a system is observed, any future observation will always yield the same result. Would this hold true if the original-and-only observer, without any ...