What is Accelerated charge: Definition and 20 Discussions

Accelerated Rehabilitative Disposition (ARD) is a pretrial intervention program in the Commonwealth of Pennsylvania, United States for non-violent offenders with no prior or limited record.
The primary purpose of the program is the rehabilitation of the offender and secondarily the prompt disposition of charges, eliminating the need for costly and time-consuming trials or other court proceedings. Accordingly, Defendants are generally required to waive certain constitutional rights in exchange for consideration of their case for ARD. The aim of the program is to intervene at an early state, so that steps can be taken to prevent future incidents of a similar nature.Candidates admitted into the program are closely screened by the district attorney’s office. To be accepted into an ARD program the defendant has to agree to certain conditions such as making restitution or completing substance abuse treatment. While in an ARD program, defendants are placed under supervision, similar to probation. They may also be ordered to do community service.
The defendant doesn't have to admit to any wrongdoing when applying for ARD, but must plead guilty to any summary offenses, usually violations of the motor vehicle code. The court may impose costs and assessments, but not a fine. Roughly 90% of the people in the ARD program have been arrested for driving under the influence of alcohol or a controlled substance.
The maximum period of supervision for someone on ARD is two years. After successfully completing the program, the ARD offender may petition the court to have the charges dismissed and the case expunged. If the offender does not comply with the conditions of the program, he or she may be removed from the program and the case will be placed back on the trial list.

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  1. F

    I Light Through Matter: Quantum Mechanics & Complex Vectors

    I've been reading Feynman's (classical) derivation of the refractive index and I wonder if there is a more quantum mechanical description in terms of complex number field vectors - one vector for that part of light that goes straight through and another for that part of light that goes through...
  2. A

    Poynting vector - uniform vs accelerated charge

    I am trying to understand why an accelerating charge emits radiation/electromagnetic waves but a uniformly moving one does not. I saw one video on Youtube where it seemed that it was explained by the fact that with a uniformly moving charge the Poynting vector was pointing 'in to the volume' -...
  3. G

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    Point Particle in Relativity and Electrodynamics: “The Classical Theory of Fields” – by Landau and Lifshitz, in its discussion about classical size of a particle, concludes that:- Thus we come to the conclusion that in classical (non-quantum) ‘relativistic mechanics’, we cannot ascribe finite...
  4. G

    Radiation of accelerated charge in QM

    Hi, One of the main problems of the Rutherford model is the fact that the electrons are accelerated and hence should lose energy due to radiation. Bohr's model doesn't resolve this, it only postulates that the energy levels are quantized and energy can only be emitted or absorbed by jumping...
  5. S

    Radiation of an accelerated charge

    I am having a lot of trouble understanding this concept. It seems to be the intersection of many theories: electrodynamics, special relativity, and quantum theory. Classical electrodynamics and quantum theory apparently have two different conceptions of what an EM wave is; in classical...
  6. J

    Accelerated charge inside sphere (again)

    Sorry to go on about this scenario again but I think something is going on here. Imagine a stationary charge ##q##, with mass ##m##, at the center of a stationary hollow spherical dielectric shell with radius ##R##, mass ##M## and total charge ##-Q##. I apply a force ##\mathbf{F}## to charge...
  7. G

    EM fields from an accelerated charge: something doesn't add up?

    I have seen on several books that the expression for the E field generated by an accelerated charge, at enough distance and in the non-relativistic aproximation, is something like that (taken from Jackson): where "β with the dot above" is the acceleration divided by c, n is a vector...
  8. J

    Equivalence principle implies uniformly accelerated charge doesn't radiate?

    Does a uniformly accelerated charged particle radiate em waves? The equivalence principle says that a particle in uniform acceleration is equivalent to a particle at rest in a gravitational field. A particle at rest in a gravitational field is clearly not going to radiate em waves therefore by...
  9. D

    Photons emitted by an accelerated charge

    Almost everyone is familiar with the sentence "accelerated charges radiate em waves". Nevertheless, if you are asked to derive this starting from Maxwell's equations, you might find it difficult. Surely the radiation pattern depends on the history of the motion of the charge. Then, there...
  10. A

    Radiation from accelerated charge

    If a charge undergoes acceleration it emits electromagnetic radiation. Where does the energy associated with this radiation come from? Thank you very much
  11. ShayanJ

    Electric field of an accelerated charge

    I know that an accelerated charge produces a changing electric field and so propogates electromagnetic waves.I want to know the reason or the mathematical reasonings. thanks
  12. fluidistic

    Radiation of an accelerated charge

    I'm asking this question in the quantum physics part because I'd like a quantum related answer. When a charge is accelerated, it will radiate photons. In my belief, it must radiate continuously as long as it's accelerated. Maybe I'm getting a wrong picture. Imagine an electron moving...
  13. DaTario

    Photon and the field generated by an accelerated charge

    Hi All Suppose an electron is orbiting (in classical sense) a proton at a given distance (compatible with, i.e., less than the experimentally determined value for atomic radius of Hydrogen). Let's call this initial distance R3. From classical view point this orbit has a well defined frequency...
  14. M

    Radiation emitted by an accelerated charge

    I would need to know what is the state of the art about the study of the radiation emitted by an accelerated charge. According to classical EM theory, does a uniformly accelerated charge emit radiation? Or is the radiation proportional to the 3rd time derivative of position (so that a...
  15. G

    Why accelerated charge emits electromagnetic radiation

    Its well known that an accelerated charge emits electromagnetic radiation. Then why the orbiting electrons in atom merge in nucleus after some time.
  16. G

    Frequency of electromagnetic radiation of an accelerated charge

    we know the total power of radition Radiation from an Accelerated Charge is p=2/3 (k e^2 a^2)/c^3 but what is the frequency of such radiation? and is that for the all observers the same?
  17. atyy

    Equivalence principle & accelerated charge

    This thread discusses an interesting point Jonathan Scott brought up at https://www.physicsforums.com/showthread.php?t=264782&page=2. A naive application of the equivalence principle (EP) would suggest that a free falling charge does not radiate, and that a charge on the surface of the Earth...
  18. M

    Why Doesn't the Electron Lose Energy in Bohr's Model of the Hydrogen Atom?

    One thing which is not clear to me in Bohr's model of hydrogen atom, that if accelerated charge radiates electromagnetic waves or radiations,then why in atom electron being a chrged particle retains its energy and rotates in specific orbits. with regards
  19. quasar987

    Accelerated Charge: Understand Electromagnetic Wave Emission

    Here's a question I asked in the Introductory Physics forum that went unanswered. I'm trying it again in a different forum because I'm really curious about this. Why do we say that electrons emit an electromagnetic wave when they accelerate but not when they travel at constant speed? In other...
  20. L

    EM: accelerated charge and E field

    An electron is initially at rest. At a time t1 = 0 it is accerated upward with an acceleration of 10^18 m/s^2 for a very short time (this large acceleration is possible because the electron has a very small mass). We make observations at a point A, which is 15 meters to the right of the...