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arupel
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Using the electric field as an example: Does modern physics see the electric field as one universal field covering the entire universe or because of the vast distances involved it can be several?
By definition, a field is a quantity which has a value everywhere. Range is irrelevant. The field can be zero, but it is everywhere.Khashishi said:Since the range of the electric field is infinite, it's all one field.
There is only one electric field. It is common to use "electric field of an electron" only because it happens to obey the superposition principle. Other fields do not.arupel said:As an analogy in classical physics it woud be said that the electron generates the field. The sum of the electric fields from these sources gives the resultant fielld
I am sorry, but this to me only seems like a bunch of buzzwords strung together. Particles are not fields, they are excitations of quantum fields. The fields are everywhere.arupel said:In QFT it is the observation of the field that we observe it as a particle, so the analogy is wrong, but it gives the point that I am trying to make in analogy form.
This is a philosophical question rather than a physical one and therefore not very well suited for a physics discussion.arupel said:Do the 4 fundamental forces have the same absolute necessity of existence?
My guess is no.
We can easily imagine universes where there are other forces at play.
No, there are many different types of fields in the universe, such as gravitational, electromagnetic, and quantum fields. Each type of field has its own unique properties and interactions with matter.
Fields can influence the motion and interactions of matter through the forces they exert. For example, the electromagnetic field is responsible for the attraction and repulsion of charged particles, while the gravitational field causes objects with mass to be pulled towards each other.
While all fields are interconnected in the sense that they are all part of the fabric of the universe, they can also act independently and have their own distinct properties. For example, the electromagnetic field does not directly interact with the strong nuclear field, which is responsible for holding atomic nuclei together.
Fields cannot be created or destroyed, but they can change in strength or direction. For example, an electric field can be created by moving a charged particle, and a magnetic field can be created by a current-carrying wire. However, these fields already existed in some form before they were created.
The theory of relativity describes how gravity arises from the curvature of space and time caused by massive objects. This means that gravity is not a force like the other fields, but rather a manifestation of the distortion of the fabric of the universe. This is known as the theory of general relativity.