Do Gravitational Field Lines Exist Similar to Magnetic and Electric Field Lines?

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Discussion Overview

The discussion revolves around the existence and nature of gravitational field lines in comparison to magnetic and electric field lines. Participants explore whether gravitational field lines can be considered similar to those of other fields, discussing their mathematical significance and physical interpretation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants propose that gravitational field lines can exist similarly to magnetic and electric field lines, suggesting a conceptual parallel in how these fields are represented.
  • Others argue that field lines, including gravitational ones, are merely mathematical tools and do not "exist" in a physical sense, emphasizing that all field lines are representations of vector fields.
  • A participant questions whether gravitational field lines connect the centers of gravity of massive bodies, similar to how electric field lines connect charges.
  • It is noted that gravitational field lines act radially inwards, leading to a discussion about the geometric similarities and differences between gravitational and electromagnetic fields.
  • One participant states that the gravitational field lines from a point mass resemble the electric field lines of a negative point charge, indicating a similarity in their mathematical descriptions.

Areas of Agreement / Disagreement

Participants express differing views on the existence and interpretation of gravitational field lines, with no consensus reached on whether they should be considered physically real or merely mathematical constructs.

Contextual Notes

There are unresolved questions regarding the physical interpretation of field lines and their mathematical representation, as well as the implications of their similarities and differences across different types of fields.

zd1899
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Can they exist ?? Like Magnetic Field lines and Electric Field lines
 
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I think you might be confused by what "exists" means in this context. http://en.wikipedia.org/wiki/Field_line" are often physically significant, they are still just mathematical tools. In that sense, none of them "exist". But the gravitational field isn't any different, in terms of 'having' field lines, from the EM field, or any vector field, really.
 
Last edited by a moderator:
whybother said:
I think you might be confused by what "exists" means in this context. http://en.wikipedia.org/wiki/Field_line" are often physically significant, they are still just mathematical tools. In that sense, none of them "exist". But the gravitational field isn't any different, in terms of 'having' field lines, from the EM field, or any vector field, really.

Like an Electric field connects one point to the charge to the other..in that context , would a Grav. field line connect any two centre's of gravity?

Also it will always act radially inwards for a particle , so is the geometry similar to other Field lines?
 
Last edited by a moderator:
zd1899 said:
Like an Electric field connects one point to the charge to the other..in that context , would a Grav. field line connect any two centre's of gravity?

Also it will always act radially inwards for a particle , so is the geometry similar to other Field lines?

Gravitational field lines "connect" massive bodies as much as electrical field lines do. Field lines are mathematical, they are not physical.

The geometry of the gravitational and EM fields are similar, but there are differences. They are both 'radial' though, in the sense that they come from the mass/charge of the particle.
 
Magnetic and electric fields lines are a model for describing forces which act at a distance, and since gravity acts at a distance it can be described by the same model.

The gravitational field lines from a point mass look identical to the electric field lines of a negative point charge.
 

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