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About fields and energy

  1. janesix profile image59
    janesixposted 23 months ago

    I am reading about physics, and I have a question about something I read:

    "There's one field for each type of particle. So one field for all photons in the universe, one field for all electrons, and so on. And these fields exist everywhere.

    To "extract" a particle from a field, you need to give the field energy. If you give it enough energy, the field will go to a higher energy state. These states are what we interpret as particles."

    Can a "field" exist without energy?

    1. janesix profile image59
      janesixposted 23 months ago in reply to this

      I hope someone knows. I asked this on another forum and got a bunch of conflicting answers.

      Is a field something that is a thing that can exist without particles or energy?

      1. Kathryn L Hill profile image84
        Kathryn L Hillposted 23 months ago in reply to this

        the question is... is the field made of matter?

        1. janesix profile image59
          janesixposted 23 months ago in reply to this

          Matter has volume and mass. I'm not sure if a field has volume and mass.

          Not even sure if a field is a physical thing. That's what I'm tryin g to figure out.

          1. Kathryn L Hill profile image84
            Kathryn L Hillposted 23 months ago in reply to this

            Is the field made of energy?

            1. janesix profile image59
              janesixposted 23 months ago in reply to this

              I don't know. It seems to be the field that gives structure though.

              1. Kathryn L Hill profile image84
                Kathryn L Hillposted 23 months ago in reply to this

                "The fact that the electromagnetic field can possess momentum and energy makes it very real... a particle makes a field, and a field acts on another particle, and the field has such familiar properties as energy content and momentum, just as particles can have."

                In practice, the strength of most fields has been found to diminish with distance to the point of being undetectable. For instance the strength of many relevant classical fields, like the gravitational field in Newton's theory of gravity or the electrostatic field in classical electromagnetism, is inversely proportional to the square of the distance from the source (i.e. they follow the Gauss's law). One consequence is that the Earth's gravitational field quickly becomes undetectable on cosmic scales.
                Wikipedia
                If this does not help, why not?

                1. janesix profile image59
                  janesixposted 23 months ago in reply to this

                  I don't trust Wikipedia. I've read false information there before. I can't afford books, so I'm stuck with learning from the internet. Everything I read, it seems, says something different. I'm just trying to figure out the basics, so I can figure out where to go from here.

                  Some sources say energy is a physical thing, some say it is only the ability to do work. Etc.

                  1. Kathryn L Hill profile image84
                    Kathryn L Hillposted 23 months ago in reply to this

                    My brother, who has a Masters in Electrical Engineering, worked at IBM, says that Dark Matter is God. LOL!

  2. janesix profile image59
    janesixposted 23 months ago

    Maybe Slarty will come by....

  3. profile image59
    rvchristoposted 23 months ago

    great

  4. janesix profile image59
    janesixposted 23 months ago

    There are no particles, there are only fields

    http://arxiv.org/ftp/arxiv/papers/1204/1204.4616.pdf

    "As this paper shows, experiment and
    theory imply unbounded fields, not bounded particles, are fundamental. This is
    especially clear for relativistic systems, implying it's also true of non-relativistic
    systems. Particles are epiphenomena arising from fields"

 
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