Negatively charged particle with spin 1/2. A component of mundane terrestrial matter, and part of all neutral atoms and molecules. It has a mass about 1/1800 that of a proton. Its antiparticle is the positron.
3
votes
1answer
116 views
Are energies non-transferable in the Born-Oppenheimer approximation, and when does it apply?
Adiabatic approximation or the Born-Oppenheimer approximation is used whenever the electronic motion is too fast that the electrons effectively see static nuclei and the nuclei, in turn, see an ...
2
votes
2answers
703 views
Electron behavior changes when observed?
I saw this video of the double slit experiment by Dr. Quantum on youtube. Later in the video he says, the behavior of the electrons changes to produce double bars effect as if it knows that it is ...
2
votes
1answer
204 views
Small confusion related to leaving of electrons from atoms
Picking up a circuit board from a table, or our clothing rubbing as we walk, sit and work, are all examples of movement that can create static charge. One object, or surface, picks up additional ...
3
votes
1answer
308 views
How does thermal broadening of the Fermi Function cause electron coherence loss?
Generally, there are two ways for electrons to lose their wave-like properties in a solid material. One is by way of collisions that cause changes in the energy and momentum of the electron. The other ...
7
votes
3answers
444 views
Electrons in CRT
In a CRT, where do the ejected electrons go after they cause fluorescence on the screen, have they lost most of their energy, or do they actually go through the glass?
5
votes
4answers
695 views
Why photons transfer to electrons perpendicular momentum?
Linear antenna directed along z, photons (EM waves) propagate along x. Momentum of photons have only x component. Why electrons in antenna have z component of momentum?
1
vote
0answers
69 views
Scaling an electron microscope to fit within 1 cubic cm when running multiple parallel scans [closed]
Yes, I'm serious.
What components correspond to an individual scan vrs what components
can be cascaded across all objects?
Ex: The vacuum chamber can be cascaded ( colocate the sample chambers ...
4
votes
2answers
264 views
What happens where an electron is annihilated by a spontaneously generated positron-electron pair?
I was visiting the Australian Synchrotron earlier today as part of a tour group; as the guide was going over the booster and storage rings I was reminded of something I learnt of quantum.
If I know ...
5
votes
3answers
968 views
What is the difference between a neutron and hydrogen?
Differences? They are both an electron and a proton, since the neutron decays to a proton and an electron, what's the difference between a neutron and proton + electron? so is it just a higher binding ...
-1
votes
1answer
385 views
Spin of an electron [closed]
I have a conceptual difficulty in understanding the electron spin. On the one hand, it is an experimental, observable feature of electrons. The problem is in understanding to what it belongs - to a ...
1
vote
2answers
329 views
Is energy exchange quantized?
In the photoelectric effect there is a threshold frequency that must be exceeded, to observe any electron emission, I have two questions about this.
I) Lower than threshold:
What happen with lesser ...
1
vote
1answer
301 views
Measuring the magnitude of the magnetic field of a single electron due to its spin
Is it possible to measure the magnitude of the magnetic field of a single electron due to its spin? The electron's intrinsic magnetic field is not dependent upon the amount of energy it has does it? ...
5
votes
4answers
1k views
How do electrons “know” to share their voltage between two resistors?
My physics teacher explained the difference between voltage and current using sandwiches. Each person gets a bag full of sandwiches when they pass through the battery. Current = the number of people ...
3
votes
1answer
213 views
PNMR, Pulsed Nuclear Magnetic Resonance, Experiment
I am writing a lab report for class on PNMR experiment that we did. How come in this experiment we don't worry about the electron spins in our sample? Aren't the electrons affected by the PNMR machine ...
4
votes
3answers
4k views
What happens when we connect a metal wire between the 2 poles of a battery?
As I remembered, at the 2 poles of a battery, positive or negative electric charges are gathered. So there'll be electric field existing within the battery. This filed is neutralized by the chemical ...
2
votes
2answers
662 views
Active gravitational mass of the electron
In PSE here electrons are added to a sphere and gravitational modifications are expected.
My question is:
Is there any experiment that show that a negatively charged object is source of a stronger ...
-2
votes
1answer
171 views
What is the name and value of the constant that relates to electrons and that coincidentally has the same exact value as the speed of light? [closed]
There's some constant relating to electrons that also has the same value as the speed of light. What is it, what is the value, and how are they related?
EDIT: Is it the fine-structure constant?? Are ...
6
votes
1answer
623 views
Why doesn't orbital electron fall into the nucleus of Rb85, but falls into the nucleus of Rb83?
Rb83 is unstable and decays to Kr-83. Mode of the decay is electron capture. Rb85 is stable.
The nuclei Rb83 and Rb85 have the same charge. Rb85 is heavier than Rb85, but gravitation is too weak to ...
