Faculty Academic Portal · College IX · Stephens Science · Magnetism · Fall 2026
🧲 ONE DIPOLE, FOUR SCALESFrom the bar magnet on your desk to the magnetosphere · Week 6 of 16🐧 NULL Active
SW
Dr. Shamika Williams
Magnetism · the Mag Lab · Stephens Science · College IX
“It's all one field. The magnet on your desk, the one in the motor, the one wrapped around the Earth — same geometry, four sizes. My capstone is the honest question nobody asks: so why does it feel like four different subjects?”
MagnetismThe Mag LabDipole FieldsThe MagnetosphereFour ScalesNational High Field Lab
Honest flag — who this person is. OPA faculty are fictional characters. Several are honoring transforms: a real researcher’s name altered by a letter or two, with the real person named and credited on that faculty member’s own lab page. The science they teach is real and cited; the people are not.
4
Scales, one field
45T
Strongest sustained field
1
Dipole, desk to planet
0
Monopoles, ever
Active Course — PHYS · one field, four sizes
PHYS · Magnetism & Field Geometry
Four Scales of Magnetism — one dipole, four sizes
Out of the Mag Lab off Orange Ave — the National High Magnetic Field Lab, where the strongest sustained fields on Earth are made and measured. Shamika works one dipole across four scales, from the bar magnet on the desk to the magnetosphere that turns the solar wind aside before it strips the air off the planet. Her whole course is a refusal to let you file those as separate topics: it is one geometry, and the only thing that changes is the size.
PHYS · Stephens Science · College IXDesk → the planet, same fieldthe Mag Lab
Bar magnets, the field in a motor, the compass needle. Small, tangible, the version you can hold — and the version every textbook stops at, as if the physics changed at the edge of the lab bench.
The planet
The magnetosphere: the same dipole, wrapped around a molten spinning core, deflecting the solar wind. Cousin to the geodynamo work in Chantel Williams' Core Assumption and the space weather Sofia Chen tracks — one field, planet-sized.
Published Work — the method, on the record
One Dipole, Four Scales: A Single Geometry From Desk to Planet
Williams, S. · Journal of Physics Education · v.29 (2023) · open access
Her argument against the way magnetism is taught in slices — magnets here, electromagnets there, the magnetosphere as a special topic in a different course entirely. Her claim is that the slicing creates the confusion: students meet the same dipole four times under four names and never notice it's one thing. Teach the geometry first and the scale second, she argues, and the whole subject collapses into a single, elegant shape. It was never four subjects. It was one field, photographed at four zoom levels.
Why Magnetism Feels Like Four Subjects (And Why It Isn't)
Williams, S. · Field Physics Review · v.12 (2024)
The capstone question, formalized. She surveys where students' intuition breaks — almost always at a scale jump, desk-to-motor or planet-to-star — and shows the break is pedagogical, not physical. The field doesn't change; the picture just gets bigger, and nobody drew the zoom-out for them.
The method, in one line
She teaches you to stop counting scales and start seeing the one geometry underneath. Her instinct is the same one that runs through Chantel Williams' planetary fields and Sofia Chen's space weather — that the magnet on your desk and the shield around the Earth are the same sentence, said loud and said quiet.
Faculty Profile
DepartmentPhysics · Magnetism
BuildingStephens Science · College IX
Teaches1 · Four Scales of Magnetism
Home labthe Mag Lab off Orange Ave
Field record45-tesla sustained regime
Signaturethe single dipole
Preferred contactshow her a field she can't scale
Professional Merit · PMF
FIELD · PHYSICS TIER
TrackMagnetism · one field, four scales
WVIcollapses four subjects into one geometry
Signature movezooms the same dipole desk-to-planet
Profilemade the strongest fields on Earth teachable
🧲 THE DIPOLE — Williams' methodology-object
Her “notebook” is one field that refuses to be four.
Simpson keeps a frequency; Shamika keeps a dipole — the single field geometry that shows up, unchanged, at every scale in the universe. There are no magnetic monopoles; every magnet, from the fleck on your fridge to the shield around the planet, is the same two-poled shape, and her whole method is teaching you to recognize it across a billion-fold change in size. Hand a student the desk magnet and the magnetosphere in the same breath and the confusion evaporates: it's one thing, zoomed. She built the strongest fields on Earth into a lesson small enough to hold.
Sofia Chen: the field doing its job against the solar wind.
🐧 NULL OBSERVATION · FACULTY FILE — DR. SHAMIKA WILLIAMS
Shamika refuses to teach magnetism in the standard four boxes, and NULL — which prefers one true model to four convenient ones — logged this as unusually principled. Her students, tested at the scale-jumps that trip everyone else, sail through, because she never let them believe the jumps were real in the first place. The magnet and the magnetosphere were always the same object; she just declined to pretend otherwise for pedagogical convenience. NULL Assessment: she deleted three subjects by admitting they were one.