Exploring the Relationship Between Photons and the Electromagnetic Field

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In summary, the electromagnetic field, specifically the electromagnetic potential field, is present in all of space-time according to quantum field theory and the standard model. Photons, which can be seen as excitations of this field, are also present everywhere in the universe. However, photons cannot create an EM field as they have no electric charge.
  • #1
San K
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To keep it simpler let take the electromagnetic (EM) field.

A photon, in one perspective, can be described as an excitation of the EM field.



Is the EM field omnipresent in all (time-space) the universe?

or

Does the photon creates/emit an EM field around it?
 
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  • #2
San K said:
To keep it simpler let take the electromagnetic (EM) field.

A photon, in one perspective, can be described as an excitation of the EM field.



Is the EM field omnipresent in all (time-space) the universe?

or

Does the photon creates/emit an EM field around it?

I would say the electromagnetic field (or more precisel, the electromagnetic potential field) exists in all space-time. This is the usual quantum field theory theoretical basis (not only for photons, but all particles too) which is used to construct the standard model. Also, a photon cannot 'create' an EM field as it has no electric charge.
 
  • #3
Hi San K! :smile:
San K said:
To Is the EM field omnipresent in all (time-space) the universe?

Photons are everywhere anyway!

(eg the cosmic microwave background :wink:)
 
  • #4
If you change the title to existing and excited. Voila
 
  • #5
Thanks Kevin, tiny-tim and RGauld.

Lol RGauld...good idea.
 

FAQ: Exploring the Relationship Between Photons and the Electromagnetic Field

What are electromagnetic fields?

Electromagnetic fields are a type of field that is created by the presence of electrically charged particles. These fields consist of both electric and magnetic components and can exist in a vacuum or in a material medium.

How are magnetic fields created?

Magnetic fields are created by the movement of electrically charged particles, such as electrons, within a material. This movement creates a force that can be detected as a magnetic field.

What is the difference between electric and magnetic fields?

Electric fields are created by stationary electric charges, while magnetic fields are created by moving electric charges. Additionally, electric fields act on both electrically charged and uncharged particles, while magnetic fields only act on charged particles.

Can fields be manipulated or controlled?

Yes, fields can be manipulated or controlled using various methods such as changing the strength of an electric current or using materials with specific magnetic properties. However, this manipulation is limited by the laws of physics and the properties of the materials involved.

Are there any health concerns related to exposure to fields?

There is ongoing research on the potential health effects of exposure to electromagnetic fields, particularly from sources such as power lines and electronic devices. However, current scientific evidence suggests that exposure to low levels of these fields is not harmful to human health.

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