Main Question or Discussion Point
Electron oscillate at their natural frequency. I know the force that brings them back is a force of attractrion (Coulomb law) but what pushes them away?
Er.. what is an electron's "natural frequency"?Electron oscillate at their natural frequency. I know the force that brings them back is a force of attractrion (Coulomb law) but what pushes them away?
I have always found that it is almost "futile" to guess at a question that has been posed in such a vague manner. Even if one were to assume that this particular question meant either an electron in an atom, or the deBroglie wave, it still doesn't define a "natural frequency" because in both cases, there can be more than just ONE "frequency" involved.I guess you mean within an atom... then, it's a rather tricky question! Two possible answers:
(1) Short story: "centrifugal force". Along with Coulomb attraction create an "effective potential" for the radial variable which has a minimum and, around it, a well which looks like a harmonic oscillator well for low amplitudes.
(2) You mean the frequency of rotation around the nucleus. Then, nothing to do with harmonic oscillators.
If we examine the theory of Rayleigh scattering in air, the conventional theory has the electrons in atoms being displaced from the nuclei center by the E field vector of the incoming visible light photons, and pulled back by the nuclear charge center (hence dipole oscillation). The oscillation is in phase with, and at the frequency of, the incoming radiation, hence the driving force frequency. The atoms re-radiate in the plane perpendicular to the E vector, which is why Rayleigh scattering (blue sky light) at 90 degrees is polarized.
You really need to sit down and think through your question, because if you look at the very beginning of this thread, you mentioned no such thing, but you somehow expected us to be able to read your mind and figure out what you meant. It took SEVERAL posts to actually extract something resembling a clarification of what you actually are looking for. Oy vey!Im trying to understand how an electromagnetic wave makes charges oscillate which makes em radiation similiar to the original wave. I was trying to find out about oscillation at its base to understand how it really happens.
when the electrons are bound to the nucleus the light produced is exactly the same as when they are free (as in a conductor) only the amount of light produced is different. instead of total reflection from the surface (like a mirror) you only get partial reflection (like from the surface of water).Im trying to understand how an electromagnetic wave makes charges oscillate which makes em radiation similiar to the original wave. I was trying to find out about oscillation at its base to understand how it really happens.