Physical interpretation of the Laplace operator

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Discussion Overview

The discussion revolves around the physical interpretation of the Laplace operator, comparing it to the established physical interpretations of the divergence and curl in vector fields. Participants explore how the Laplace operator relates to electric potential and electric fields.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions whether there is a physical interpretation of the Laplace operator similar to that of divergence and curl.
  • Another participant suggests that the Laplacian of an electric potential indicates how strongly the associated electric field diverges.
  • A subsequent reply seeks clarification, asking if the Laplacian of the potential actually describes how much the electric field diverges.
  • Another participant humorously points out that the two statements may be equivalent, indicating a potential misunderstanding.
  • A later reply acknowledges a misreading of the previous post and expresses gratitude for the clarification.

Areas of Agreement / Disagreement

The discussion contains some confusion regarding the relationship between the Laplacian of the potential and the divergence of the electric field, indicating that there is no clear consensus on the interpretation.

Contextual Notes

Participants have not fully resolved the implications of the Laplace operator in relation to electric fields, and there may be assumptions about the definitions of divergence and potential that are not explicitly stated.

ralqs
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"physical" interpretation of the Laplace operator

Is there a "physical" interpretation of the Laplace operator, much like there exists a physical interpretation of the divergence and curl?
 
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The divergence of an electric field indicates how strongly the field "diverges".

But an electric field can be integrated to an electric potential.
This makes the electric field the gradient of the electric potential.

Now the laplacian of an electric potential indicates how strong the field associated with the potential diverges.
 


Is it possible you meant that the laplacian of the potential says how much the electric field diverges?
 


ralqs said:
Is it possible you meant that the laplacian of the potential says how much the electric field diverges?

Uhh, isn't that the same thing? :rolleyes:
 


Uh, woops, yes, I misread your post.

Thanks a lot!
 

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