Not signed in (Sign In)

Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

  • Sign in using OpenID

Site Tag Cloud

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nforum nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf sheaves simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to nForum
If you want to take part in these discussions either sign in now (if you have an account), apply for one now (if you don't).

nLab > Latest Changes: flux

Bottom of Page

1 to 6 of 6

  1.  
    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeOct 13th 2011

    one possible bit of information at flux

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeMar 5th 2023
    • (edited Mar 5th 2023)

    I have added a figure (here) showing the schematics of magnetic flux (lines) through a surface.

    This figure is grabbed from hyperphysics.phy-astr.gsu.edu/hbase/magnetic/fluxmg.html.

    From memory, I was expecting to find a good figure of this kind in either Frankel’s “The geometry of physics” or in Misner, Thorne & Wheeler’s Gravity — but looking through both books again, I was surprised that an actual figure showing flux lines/density through a surface is not present in either (the famous “egg-crate figures” of MSW seem more an illustration of the mathematics of exterior calculus than of the physics of flux).

    If anyone knows a good illustration of magnetic flux (lines) through surfaces from a canonical (textbook) reference, please let me know.

    diff, v8, current

    • CommentRowNumber3.
    • CommentAuthorUrs
    • CommentTimeMar 5th 2023
    • (edited Mar 5th 2023)

    have enhanced the figure a little (here)

    diff, v9, current

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeJun 13th 2023

    added pointer to:

    • Raymond Brock, Faraday’s Lines of Force – Modern Physics Begins, chapter 11 in: Quarks, Spacetime, and the Big Bang, lecture notes [chapter: pdf, full text:pdf]

    and will add this also to Michael Faraday

    diff, v10, current

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeJun 16th 2023
    • (edited Jun 16th 2023)

    added (here) one of the original iron filings pictures by Faraday, from 1851

    diff, v11, current

    • CommentRowNumber6.
    • CommentAuthorUrs
    • CommentTimeDec 14th 2023
    • (edited Dec 14th 2023)

    added pointer to:

    • Michael Faraday, Delienation of Lines of Magnetic Force by iron filings, §37 in: Experimental Researches in Electricity.–Twenty-Ninth Series, Philosophical Transactions of the Royal Society of London 142 (1852) 137-159 [doi:10.1098/rstl.1852.0012, jstor:108540]

    together with a scan of “Plate IX”, now here.

    (Grabbed the scan from Twitter: The resolution is not great, but still much better than what is behind the above official DOIs…)

    diff, v13, current

1 to 6 of 6

  1.