Designing An Electron Beam Gun for Two-Slits Experiment

  • Thread starter Thread starter masonstjon
  • Start date Start date
  • Tags Tags
    Design Equipment
masonstjon
Messages
2
Reaction score
0
Can an electron beam gun be made to where the very end of the gun (the end that the electron is emitted from) can be made to be the exact size of an electron?

The reason I ask is this: In attempts to discover how an electron travels through the two-slits experiement, it was determined that the electron has "wave-like" properties. This was one of the big steps toward quantum mechanics.

But...How were these experiments truly performed? Did they have the electron gun, the two slits, the measuring plate behind in a completely vacuumed room with no other particles whatsoever in it. And was the gun point made to be the size of an electron?

If not, then any of the aformentioned items could have changed the results. Since Electrons are sooooo small, then even the gun's barrel could have allowed the electron to have "bounced" around before being emitted. This could easily change the resulting position of the electron.

And finally, has the two-slits experiment been done with measuring plates fully circling the entire experiement area to measure where electrons might have ended up?
 
Physics news on Phys.org
The electron can enter the apparatus as a plane wave and still exhibit the interference pattern, so it doesn't have to come from a point source. The two slit experiment has been done with several kinds of detectors, photograpic film, scintillation screens etc.. And yes, for the electron the experiment has to be carried out in a vacuum.
 
Tyger said:
The electron can enter the apparatus as a plane wave and still exhibit the interference pattern, so it doesn't have to come from a point source. The two slit experiment has been done with several kinds of detectors, photograpic film, scintillation screens etc.. And yes, for the electron the experiment has to be carried out in a vacuum.

The interference pattern has also been observed from a josephson junction of a superconductor, so this phenomena is not restricted to free electrons moving in vacuum alone.

Zz.
 
Thank you ZapperZ, for adding that. I hadn't thought of that possibility.
 
Thanks gang!
 
Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...
I asked a question related to a table levitating but I am going to try to be specific about my question after one of the forum mentors stated I should make my question more specific (although I'm still not sure why one couldn't have asked if a table levitating is possible according to physics). Specifically, I am interested in knowing how much justification we have for an extreme low probability thermal fluctuation that results in a "miraculous" event compared to, say, a dice roll. Does a...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
Back
Top