Pith. sign in

REVIEW 4 major objections 7 minor 5 references

Anomalous deflection of an electron after passing through magnetic-field zero point

T0 review · 4 major / 7 minor · reviewed 2026-08-14 · deepseek-v4-flash

Challenge this review Re-run · record.json Download PDF Read on arXiv ↗ Review JSON

Pith's one-line read An electron crossing a magnetic-field zero point can deflect opposite to the Lorentz force for tens of micrometres.

desk verdict A serious but unsupported empirical claim: the reported reversed Lorentz force likely reflects an unmeasured shift of the field zero point, yet the paper is honest, systematic, and deserves a genuine referee rather than a desk reject. read the letter →

arxiv 1908.03843 v32 pith:QPXFD7R4 submitted 2019-08-11 physics.gen-ph

Changgen Zou , Wanshou Jiang This is my paper · ORCID
classification physics.gen-ph
keywords electrondeflectionLorentzforcemagnetic-fieldzeropointspininertiaMagnuseffectU-particlemodelMaxwell'sequationscathode-raytube
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This paper claims that an electron beam crossing a magnetic-field zero point can deflect in the direction opposite to the Lorentz force for a short interval around the null. The evidence is a series of cathode-ray-tube measurements in which the line image keeps rotating past the point where standard electromagnetism says it should reverse, with the reversal shifted by an amount that depends on the direction of the field the electrons enter first. The proposed cause is the inertial effect of the electron rotating about its own axis in the magnetic field, with the Lorentz force presented as a Magnus-like pressure effect in a space-filling mechanical medium. The paper then uses this U-particle mechanical model to derive Coulomb's law, gravitation, and Maxwell's equations, making the anomalous deflection a predicted consequence. If correct, the Lorentz force law would fail in a narrow region around magnetic nulls and would need to be replaced by a richer mechanical description.

What carries the argument

The load-bearing device is the U-particle mechanical model: space is filled with postulated tiny rotating particles whose rotational kinetic energy gradients create electric and gravitational forces and whose macro-motion curl creates magnetic fields. An electron is modelled as a sphere of high-speed rotating tiny balls with angular momentum pointing inward; in a magnetic field this spinning electron acts like a flywheel, so when the field reverses at the null the spin inertia keeps the electron moving in its original curved direction for a short distance. The central mathematical identity is the vector-product force law $\mathbf{F}=q\mathbf{v}\times\mathbf{B}$ arising as a Magnus-type pressure imbalance rather than as a fundamental force, with the magnetic field itself identified with the curl of the U-particle macro velocity.

What would settle it

Run the same moving-coil scan while independently recording the axial magnetic field with a Hall probe and the screen reference with the laser distance sensor, then compare the cubic-fit deflection maximum with the measured zero crossing. If the maximum coincides with the field zero once sensor offsets are removed, the reversed-force claim fails.

Watch

Extended reading notes

Core claim

On its own terms, the paper reports a measured reversal of the expected Lorentz deflection. In a cathode-ray tube with an odd-symmetric magnetic field produced by two reverse-connected coils, the electron image should stop rotating and reverse when the screen is at the field zero; instead it continues rotating past that point, reaches a maximum tens of micrometres away, and only then reverses. The shift is asymmetric: it is larger when the first magnetic field the electrons enter points opposite to their motion than in the same-direction case. The paper attributes this to the inertial effect of the electron rotating about its own axis inside the magnetic field, treats the Lorentz force as a Magnus effect in a U-particle medium, and uses that mechanical model to predict the anomaly and to derive Maxwell's equations.

Load-bearing premise

The argument stands or falls on the assumption that the two reverse-connected coils create an odd-symmetric field with a single zero at the coupled-tube midpoint; if the field profile is asymmetric or the screen-position reference is offset, the observed extremum shift would be a geometry artifact rather than a reversed force.

Editorial extensions

If this is right

  • The Lorentz-force reversal point is not the magnetic-field zero; standard charge-to-mass measurements using magnetic focusing would carry a built-in offset in non-uniform fields.
  • The extremum offset should depend on the direction in which the beam first meets the field, giving a testable asymmetry rather than a simple uniform shift.
  • Lorentz force can be treated as an emergent Magnus-type pressure, so Maxwell's equations appear as the macroscopic limit of a mechanical kinetic model.
  • Electron spin inertia becomes measurable through beam deflection, making a cathode-ray tube a probe of the electron's internal rotation.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • Not tested in the paper, an independent Hall-probe scan of the axial field would show whether the fitted deflection extremum tracks the measured zero or trails it; the paper reports no such direct field measurement.
  • If spin inertia is the cause, changing the accelerating voltage or coil current should move the extremum offset in a predictable way, which would separate the effect from a fixed screen-offset artifact.
  • The same model would predict analogous offsets for other charged particles crossing a magnetic null, scaled by their internal rotation; testing this would show whether the anomaly is specific to electrons or general.
Share X Bluesky LinkedIn Reddit HN

Signed reviews

No signed human review yet.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 7 minor

Summary. The paper reports a cathode-ray experiment in which an electron beam passes through the magnetic-field zero point formed by two reverse-connected coils, and claims that the beam deflects in the direction opposite to the Lorentz force within tens of micrometres of the zero point. The central evidence is a set of 672 photographs processed into averaged relative deflection angles (Table 1), whose cubic fits yield extremum positions shifted by sub-millimetre amounts that depend on the current direction. The paper interprets this as a failure of the Lorentz force near a field null and as confirmation of a U-particle mechanical model presented in Appendix A, in which Lorentz force is analogous to the Magnus effect and Maxwell's equations are derived from the U-particle collision rules.

Significance. If the central claim were correct, it would imply that the Lorentz force law fails in a narrow interval around a magnetic-field null, which would be a fundamental discovery. The paper makes a falsifiable prediction and reports a substantial data-collection effort, including a differential measurement scheme and a stated public link to data and Python code, and the appendix attempts a fully mechanical derivation of electrostatics, magnetostatics, and Maxwell's equations. However, as assessed below, the experimental evidence lacks the uncertainty quantification and field calibration needed to support such an extraordinary claim, and the theoretical model provides only qualitative predictions with many free parameters.

major comments (4)
  1. [Section 3, Table 1] The central claim relies on a sub-millimeter difference between the extremum positions of two cubic fits, but Table 1 reports only averaged relative deflection angles with no per-point standard deviations, no confidence intervals, and no fit residuals. Because the 0.20 mm step size is comparable to the claimed shifts, the data as presented cannot be distinguished from measurement noise. The authors should report the full uncertainty budget, including the 0.01 mm laser sensor accuracy, camera pixel scale, and fit uncertainty, and should provide a statistical test comparing the two extremum positions.
  2. [Section 1, Section 3] The magnetic field profile B(x) is never measured; it is assumed to be odd about the coupled-tube midpoint. An unmeasured uniform or slowly varying ambient field shifts the zero crossing in opposite directions for the two current polarities, which would produce exactly the reported sign-dependent extremum shift. With the stated coil parameters, a background field of order 0.1–1 mT is sufficient to produce shifts of the observed magnitude. The statement in Section 4 that geomagnetic orientation had 'little influence' does not exclude local fields from current leads, power supplies, or CRT components. An in-situ measurement of B(x) along the tube axis, or a null experiment using reversed coil geometry, is required to establish the claimed zero point.
  3. [Appendix A, U-5/U-6/U-10, Section 8] The model's prediction is qualitative: it states that the maximum deflection occurs at point A rather than O (Fig-A29) but provides no predicted magnitude or functional dependence of the shift. The collision rules in U-5 and U-6 encode the sign of charge interaction, and parameters such as R, m_u, E, T, and a are free; therefore the agreement reported in Section 4 is not a quantitative test of the model. A parameter-free or independently calibrated prediction of the extremum shift is needed.
  4. [Appendix A, U-17 and explanation] Magnetic induction B is defined in U-17 through the classical Lorentz force F = qv × B, and the model then uses this definition to derive Maxwell's equations. The derivation is therefore calibrated to reproduce standard electromagnetism rather than independently derived from the U-particle axioms. This circularity weakens the claim that the model provides independent theoretical support for the reported anomaly.
minor comments (7)
  1. [Abstract, Section 2] The abstract and Section 2 use 'several tens of micrometres' for the deflection region, while the experimental step size is 0.20 mm (200 micrometres); the relationship between these numbers should be clarified.
  2. [Fig-7] The labels x_1 and x_2 are introduced in Fig-7 and referenced in the text but are never explicitly defined in terms of the measured screen and coupled-tube positions.
  3. [Table 1] The table does not state the units of the deflection angles, nor whether the values are angles in degrees, radians, or some other dimensionless measure; the text mentions 27.949539 degrees for one photo, which is inconsistent with the tabulated values around 0.8.
  4. [Section 4] The fitting equations and extremum positions are garbled in the provided text (e.g., 'its extreme point is ...'); the paper should provide explicit polynomial coefficients, extremum coordinates, and residuals so the analysis can be reproduced.
  5. [Section 4] The claim that geomagnetic direction, earth rotation direction, and coil connection method have 'little influence' is qualitative; a quantitative comparison of subgroup means and variances should be provided.
  6. [Section 3] The data and code are made available through a file-sharing service rather than a permanent archival repository; depositing in a DOI-bearing repository would improve reproducibility.
  7. [Appendix A] Several referenced equations (e.g., Eq. (1) for rotational kinetic energy, Eq. (7) for gravitation) are not fully displayed in the manuscript text, making it difficult to follow the derivations.

Circularity Check

2 steps flagged · score 6.0 of 10

Coulomb sign and Maxwell equations are partly encoded in the model's collision rules and in calibration against classical formulas; the experimental anomaly itself is not circular, though its zero-point assumption is unverified.

  1. self definitional [Appendix A, U-5 and U-10]
    "U-5: ... if the two U-particles are same kind ... reduced rotational kinetic energy is transformed into translational kinetic energy; (2) if ... different kind ... rotational kinetic energy ... after collision is ... . U-10: The reason why two electrons repel each other is that rotational kinetic energy of Up between them is more and translational kinetic energy of second-hand Us colliding with electrons is more. ... The reason why an electron and a proton attracts each other is that rotational kinetic energy ... is more and translational kinetic energy ... is less."

    Electrons are defined as emitters of Up and protons as emitters of Ue (U-6, U-7), so 'same kind' in U-5 is exactly a like-charge pair and 'different kind' is an unlike-charge pair. U-5 stipulates that same-kind collisions convert rotational energy into translational energy (increased pressure), whereas different-kind collisions conserve rotational energy (less translational transfer). U-10 then 'explains' repulsion and attraction by precisely that pressure difference. The sign of the electrostatic force is therefore an input of the collision rule, not a mechanical consequence; the derivation of why like charges repel and opposite charges attract reads the answer back from U-5.

  2. renaming known result [Appendix A, Section 4; U-17 explanation; U-18; U-24]
    "U-17: The definition of magnetic induction B in classical electromagnetics comes from Lorentz force ... therefore, the magnitude of magnetic induction B is ... . Section 4: In order to verify correctness of U-particle model by using existing achievements of classical electromagnetics, definition and unit of classical electromagnetics should be used uniformly. U-18: Comparing the two equations, we can see that the permeability of vacuum is ... . U-24: ... Maxwell's equations ... Explanation: It is completely consistent with the results of classical electromagnetics."

    The model fixes the relation between B and the U-particle curl field by demanding equality with the classical Lorentz force and with the classical Biot-Savart field of an infinite wire; epsilon_0 and mu_0 are imported from classical definitions and measurements. The later 'derivation' of Maxwell's equations (U-24) re-expresses those calibrated classical formulas in U-particle language, as gradients and curls of rotational kinetic energy and macro velocity. Because the constants and field definitions are taken from the target theory, Maxwell's equations are not an independent first-principles prediction; they are recovered from classical electromagnetics by renaming and calibration.

full rationale

The experimental part is not formally circular: the deflection data and cubic fits are presented, and the reversed-Lorentz-force inference depends on the assumed odd B(x) with zero at the coupled-tube midpoint. That assumption is vulnerable to an unmeasured ambient field shifting the null, but that is an experimental-control issue, not a definitional reduction. The circularity is in the U-particle model's derivation of electrostatics and Maxwell's equations: U-5 encodes the same/different-kind asymmetry that U-10 uses to explain repulsion/attraction, and the field constants are calibrated against classical Lorentz and Biot-Savart results before Maxwell's equations are 'derived.' The Appendix A prediction is qualitative and its verification refers back to the same authors' experiment, so it adds no independent support. Overall, the central experimental anomaly retains independent content, but the claimed first-principles derivation is partially circular, giving 6.

Assumptions & free parameters 4 free parameters · 5 assumptions · 3 invented entities

The central claims rest on an unobserved particle substrate and collision rules that are adjusted to reproduce the very laws the paper claims to derive. The experimental anomaly is inferred from cubic fits of averaged data without error bars or an independent B-field measurement, so the ledger is dominated by ad hoc postulates and calibrated parameters.

free parameters (4)
  • Electron radius R = assumed small, likely ~10^-15 m (value not cleanly readable in extracted text)
    Set by hand in U-7 and U-11; sets the length scale of the inverse-distance decay of U-particle rotational energy and the predicted 1.8R distance where electrostatic repulsion vanishes.
  • U-particle mass m_u and total kinetic energy E = no numerical values given; eliminated when matching known constants
    The model is calibrated to e, c, epsilon_0, mu_0 and G, but m_u and E are never independently measured, leaving the substrate empirically unconstrained.
  • Proton outer-layer radius T and collision proportion a = not quoted; tuned to reproduce G
    Introduced in U-12 to produce the gravitational force; a controls the fraction of U-particle collisions with the proton outer layer and is adjusted to match the measured gravitational constant.
  • Cubic-fit coefficients for the two averaged deflection curves = left-curve extremum near -0.84 mm; right-curve extremum near -0.42 mm (per Fig-13 text)
    These coefficients are fitted to the averaged data to locate the deflection-angle extrema; no uncertainties are reported, yet the shift between the extrema is the central observable.
assumptions (5)
  • ad hoc to paper U-particles exist, fill space, and have the collision properties in U-2, U-5 and U-6.
    No direct detection or independent evidence; these postulates are the substrate from which force laws are derived.
  • domain assumption Rotational kinetic energy of the Up released by an isolated electron decreases as 1/r and has constant flux in equilibrium (U-7, B-1).
    Based on a diffusion analogy with Fick's law; the flux constant and boundary conditions are specific to the model and not independently measured.
  • domain assumption Electrons and protons rotate about their own axes in a magnetic field with angular velocity proportional to the local field (U-13, U-16).
    This spin-axis rotation is the physical mechanism invoked for the inertial reversal; it is not measured and is assumed to follow from the U-particle velocity curl.
  • standard math The classical constants e, epsilon_0, mu_0, c and G can be used as given calibration benchmarks, while the model quantities are identified with them (U-15, U-18, U-19).
    The derivation uses the measured values of these constants as inputs, not as predictions.
  • domain assumption The tangent angle of the odd-symmetric line image at its inflection point equals the deflection angle of an ideal straight line (Section 3).
    The measurement pipeline relies on cubic fitting of a curve whose midpoint cannot be directly identified; this optical-geometry assumption is not validated.
invented entities (3)
  • U-particle (Ue and Up subtypes)
    purpose: Hidden substrate whose translational and rotational kinetic energy, and collisions with charges, generate electric and magnetic fields and forces.
    No detection, no independent falsifiable prediction; the claimed experimental verification is qualitative and was used to support the model.
  • Second-hand U-particle (Us)
    purpose: Collision product that transmits pressure differences to charges, producing electrostatic and Lorentz forces.
    Derived from the model's collision rules; not independently observable.
  • Electron internal structure of high-speed rotating tiny balls (Fig-A2)
    purpose: Provides the spin inertia and Magnus-effect mechanism invoked for the reversed Lorentz force.
    The existence of the tiny balls and their rotation axes is not evidenced outside the model.

how reviews work

0 comments
Cite this review

Pith. "Pith review of Anomalous deflection of an electron after passing through magnetic-field zero point." pith.science (2026). https://pith.science/paper/QPXFD7R4

@misc{pith2026190803843,
  author       = {Pith},
  title        = {Pith review of: Anomalous deflection of an electron after passing through magnetic-field zero point},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/QPXFD7R4}},
  note         = {Machine review of arXiv:1908.03843}
}
read the original abstract

This paper reports an experiment about anomalous deflection of cathode ray in odd-symmetric magnetic field. The experiments shows that after passing through the magnetic-field zero point formed by two opposing magnetic fields, an electron deflects in the direction opposite to the Lorentz force within several tens of micrometres from the zero point. It can be explained by the inertial effect of the electron rotating on its axis in magnetic field, and Lorentz force is similar to the Magnus effect in fluid. In this paper, a mechanical model that replaces potential energy with rotational kinetic energy is used to calculate the force exerted on an electron and a proton under different conditions, and the Maxwell's equations of electromagnetic field are derived.

Discussion (0). Continue with ORCID to comment.

Reference graph

Works this paper leans on

5 extracted references · 5 canonical work pages

  1. [1]

    Electromagnetics and electrodynamics

    Youqiu Hu, Fuzhen Cheng, Bangjiao Ye, Zhijing Liu. Electromagnetics and electrodynamics. University of Science and Technology of China, Hefei, 2013

    work page 2013

  2. [2]

    Conduction of Electricity Through Gases

    J.J.Thomson. Conduction of Electricity Through Gases. University of Cambridge,1933

    work page 1933

  3. [3]

    Electromagnetic field and electromagnetic wave

    Jiali Wang, Manzuo Zhu, Hongmin Lu. Electromagnetic field and electromagnetic wave . Xidian University, Xian, 2016

    work page 2016

  4. [4]

    F. W. Sears , G. L. Salinger . Thermodynamics, Kinetic Theory and Statistical Thermodynamics. Addison–Wesley, Reading, MA, 1975

    work page 1975

  5. [5]

    Physical Hydrodynamics

    Xianzhi Wang. Physical Hydrodynamics. Tsinghua university press, Beijing, 2018

    work page 2018

Pith tools

Reviewed August 14, 2026 · model on record in the stance chip above.