Recent content by Northprairieman

Hydrogen electrons can spin-flip and emit a 21 cm photon. Can core electrons in a metal like lithium spin flip? If so, is the energy required to do so similar to hydrogen?

nevermind, I found what I was looking for. https://en.wikipedia.org/wiki/Two-photon_absorption

If you hit a bound electron with a photon corresponding to that electron's ionization energy, you ionize the electron. What if you hit the electron with a photon with less energy? Will the photon still add its energy to the electron? Will the electron re-emit the photon with less energy? Do you...

I was just thinking of a lithium wire in a strong electric field (a field surrounding the wire, not just the field along the axis of the wire to get current) and how strong of an electric field you would need to excite a core electron into becoming a conduction electron.

What's the electric field strength needed to get one of lithium's core electrons into the conduction band? How do you figure this out?

Say you had two needles sticking out of an insulator in an air-filled chamber covered by an aluminum foil cup. The needles are charged to a high enough electric field to cause dielectric breakdown of air. Will a spark go from needle to needle? Or will the needles cause an induced negative charge...

The n = 2 energy level of lithium is 108.8 eV away from the n = 1 energy level. Does that mean, in a DC circuit, that if you put an emf of 108.8 V along a lithium wire, that the high voltage will excite an electron to the n = 2 level?

What effect does an electric field have on a bound electron? Does it slow it down or affect its orbit in any other way? Does an electric field cause an electron to move to another energy level? What effect does a magnetic field have on a bound electron? Does it slow it down or affect its...

Do electrons lose heat? If they do, how do they do it? Bremstrahlung for free electrons and going down to a lower energy level for bound electrons? If you had say a metal and cooled it down, would the electrons move slower or just jump to lower energy levels and lose photons?

If a charged particle passes through a magnetic field it will be deflected according to the right hand rule, i.e. VxB. What if the magnetic field lines are parallel to the velocity of the particle? Will the particle still be deflected?

You know how a microwave oven has a mesh on the door so visible light gets through but not the microwaves? Can such a thing be done with infrared radiation too? Is it possible to block heat from getting through a mesh but not visible light?

So according to this post: https://www.physicsforums.com/showthread.php?t=487014 In the little diagram there, it shows a B field generated by a moving charge. So if I understand this correctly, that's a "static" B-field (not a moving B-field) and hence does not produce a magnetic flux...

Thanks for the responses. So what if you had a stream of protons? Would that be equivalent to the pole of a magnet? In this stream of protons, will each successive proton be slowed down because the proton before it passing through the loop made the loop of wire no longer uniformly neutral?

Hi there, If a proton passes through a loop of wire, it induces a tiny current in the wire. Will the proton lose energy and slow down as a result of this? If so, by how much?

Hi there, When you have a loop of wire and you move a bar magnet through it, you induce a current in the wire. What if you were in a room where there was a magnetic field (not moving) that was stronger than the magnetic field produced by the magnet? If you moved the magnet through the loop...