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sharma_satdev
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what is the source of electromagnetic radiation when electron is accelerated
Accelerated Electron: EM Radiation Source
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When an electron is accelerated, the source of electromagnetic radiation is the energy supplied by the force causing the acceleration. This energy not only increases the electron's momentum but also contributes work to the electromagnetic field. The interaction between the accelerated electron and the surrounding field results in the emission of electromagnetic radiation. Understanding this process is essential in fields such as particle physics and electromagnetism. The relationship between force, momentum, and energy is crucial in explaining the phenomenon.
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tiny-tim
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hi sharma! 
if you mean "where does the energy come from?", the answer is that it comes from whatever force is making the electron accelerate
…
when you accelerate an electron, you not only have to give it extra momentum, you also have to supply a bit of work into the electromagnetic field
sharma_satdev said:
if you mean "where does the energy come from?", the answer is that it comes from whatever force is making the electron accelerate
…
when you accelerate an electron, you not only have to give it extra momentum, you also have to supply a bit of work into the electromagnetic field
I'm thinking about the following problem. I have an electrified fluid with a constant charge density, Q, within the fluid. Will this necessarily yield a surface charge?
Would I have to compute it by looking at the displacement fields on either side of the interface? Would it change if the bulk charge within the fluid remains constant?
This is from Griffiths' Electrodynamics, 3rd edition, page 352.
I am trying to calculate the divergence of the Maxwell stress tensor. The tensor is given as ##T_{ij} =\epsilon_0 (E_iE_j-\frac 1 2 \delta_{ij} E^2)+\frac 1 {\mu_0}(B_iB_j-\frac 1 2 \delta_{ij} B^2)##. To make things easier, I just want to focus on the part with the electrical field, i.e. I want to find the divergence of ##E_{ij}=E_iE_j-\frac 1 2 \delta_{ij}E^2##.
In matrix form, this tensor should look like this...
Please can anyone either:-
(1) point me to a derivation of the perpendicular force (Fy) between two very long parallel wires carrying steady currents utilising the formula of Gauss for the force F along the line r between 2 charges?
Or alternatively (2) point out where I have gone wrong in my method?
I am having problems with calculating the direction and magnitude of the force as expected from modern (Biot-Savart-Maxwell-Lorentz) formula.
Here is my method and results so far:-
This...
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