- #1
PainterGuy
- 938
- 73
Hi,
Could you please help me with the queries below? Thanks in advance!
Question 1:
I was watching this video.
Between 8:36 to 9:44 the following is said:
"But only firing particle by single particle at this barrier with the 2 openings and by recording dot by single dot where each of those single particles lands on the detector screen. So let's run that version of the experiment and see what happens. So again, particle by single particle, we're recording on the back screen, the history of all the landing locations. And this is what happens in this experiment. Dot by single dot, we build up the same pattern, the same interference pattern, the same data. That suggests to us that there must be some kind of wave like phenomenon involved to yield this interference pattern. So this is where things get really strange. Particles, electrons little tiny dot. That is the image that we always have in mind. Waves are these spread out entities. How could a dot particle and a spread out wave somehow be connected And this was the puzzle that physicist faced In the early decades of the 20th century and many tried to figure out what could the connection between a particle and a wave be."
Please have a look at this piece from the video: https://imagizer.imageshack.com/img924/5033/e0ADHd.gif
At a time only single electron is shot at the slit and I think the electron gun should be stationary and must have a extremely nozzle like opening. Is the gun aimed at right slit or left slit, or the at the middle point of the slits?
Question 2:
In the video below between around 7:23 - 8:05 the following is said:
"well the biggest enemy of all quantum processes is something called decoherence remember how we talked about how the superposition only lost until a particle is measured well in quantum talk measured doesn't mean the same thing that it means in everyday language here measured means when this wave particle comes into contact with anything else like another particle a molecule anything when it's in this wave state it's said to be in a state of coherence when it's broken or measured the decoherence decoherence is the reason physicists need to work in such specific
conditions when they're dealing with quantum mechanical effects in the macroscopic world we're used to there are so many particles and molecules bouncing around so much jostling and wiggling due to the heat that coherence doesn't last long enough to be detected this is why we don't see quantum mechanical effects in our day-to-day lives"
I don't think this is correct in the context of electron double slit experiment. You don't need to conduct this experiment in isolation at low temperatures. The photons could interact with the electrons on their own all the time but if photon detector or any other detector is used to see which slit the electron goes through then the decoherence takes place and wave function of electron collapses and only a particle is observed. Do I have it correct?Helpful link:
1: /watch?v=EmNQuK-E0kI ("What is The Quantum Wave Function, Exactly?", insert www.youtube.com in front
Could you please help me with the queries below? Thanks in advance!
Question 1:
I was watching this video.
Between 8:36 to 9:44 the following is said:
"But only firing particle by single particle at this barrier with the 2 openings and by recording dot by single dot where each of those single particles lands on the detector screen. So let's run that version of the experiment and see what happens. So again, particle by single particle, we're recording on the back screen, the history of all the landing locations. And this is what happens in this experiment. Dot by single dot, we build up the same pattern, the same interference pattern, the same data. That suggests to us that there must be some kind of wave like phenomenon involved to yield this interference pattern. So this is where things get really strange. Particles, electrons little tiny dot. That is the image that we always have in mind. Waves are these spread out entities. How could a dot particle and a spread out wave somehow be connected And this was the puzzle that physicist faced In the early decades of the 20th century and many tried to figure out what could the connection between a particle and a wave be."
Please have a look at this piece from the video: https://imagizer.imageshack.com/img924/5033/e0ADHd.gif
At a time only single electron is shot at the slit and I think the electron gun should be stationary and must have a extremely nozzle like opening. Is the gun aimed at right slit or left slit, or the at the middle point of the slits?
Question 2:
In the video below between around 7:23 - 8:05 the following is said:
"well the biggest enemy of all quantum processes is something called decoherence remember how we talked about how the superposition only lost until a particle is measured well in quantum talk measured doesn't mean the same thing that it means in everyday language here measured means when this wave particle comes into contact with anything else like another particle a molecule anything when it's in this wave state it's said to be in a state of coherence when it's broken or measured the decoherence decoherence is the reason physicists need to work in such specific
conditions when they're dealing with quantum mechanical effects in the macroscopic world we're used to there are so many particles and molecules bouncing around so much jostling and wiggling due to the heat that coherence doesn't last long enough to be detected this is why we don't see quantum mechanical effects in our day-to-day lives"
I don't think this is correct in the context of electron double slit experiment. You don't need to conduct this experiment in isolation at low temperatures. The photons could interact with the electrons on their own all the time but if photon detector or any other detector is used to see which slit the electron goes through then the decoherence takes place and wave function of electron collapses and only a particle is observed. Do I have it correct?Helpful link:
1: /watch?v=EmNQuK-E0kI ("What is The Quantum Wave Function, Exactly?", insert www.youtube.com in front