Uploaded April 2026 | Updated September 2026, 2 weeks ago
Modern magnetism is supposed to preserve action and reaction. But when Ampère’s direct force law is replaced by Grassmann’s reformulation, that clear local push-back starts to disappear.
If magnetism is really an interaction between moving charges, that should matter. Because in some configurations, one current element can act on another while the supposed reaction is no longer clearly there at all.
The mathematics becomes cleaner. The geometry becomes easier to manage. But the physical exchange itself becomes harder to see.
This video looks at what changed, why the newer formulation took over, and what may have been lost when the direct interaction picture was left behind.
This is part three of an ongoing series on electrodynamics, magnetism, and the force laws behind them.
If you have not seen the earlier parts of the series, they help set up the full argument:
youtu.be/h9U8xrhuN-k
youtu.be/r8PccFJ9eXo
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📚 References:
All references used in this video are documented on my website:
seethepattern.org/stp.html?v=20260417-long
It serves as a living archive — with detailed source notes, direct links, and a searchable index of videos if you want to explore specific ideas or follow a thread across episodes.
#magnetism #physics #electrodynamics #ampere #grassmann #electricity #science #historyofscience
00:00 Introduction
00:34 Ampère Direct Story
01:01 Grassmann
02:45 Grassmann's Solution
03:54 The First Cost
05:09 The Second Cost
06:55 Closing the Loop
Modern magnetism is supposed to preserve action and reaction. But when Ampère’s direct force law is replaced by Grassmann’s reformulation, that clear local push-back starts to disappear.
If magnetism is really an interaction between moving charges, that should matter. Because in some configurations, one current element can act on another while the supposed reaction is no longer clearly there at all.
The mathematics becomes cleaner. The geometry becomes easier to manage. But the physical exchange itself becomes harder to see.
This video looks at what changed, why the newer formulation took over, and what may have been lost when the direct interaction picture was left behind.
This is part three of an ongoing series on electrodynamics, magnetism, and the force laws behind them.
If you have not seen the earlier parts of the series, they help set up the full argument:
youtu.be/h9U8xrhuN-k
youtu.be/r8PccFJ9eXo
💖 Support This Channel:
Your support is crucial in order to continue making quality content.
Patreon: patreon.com/seethepattern
ko-fi: ko-fi.com/seethepattern
PayPal: paypal.me/seethepattern
Merch: shop.spreadshirt.co.uk/see-the-pattern
📚 References:
All references used in this video are documented on my website:
seethepattern.org/stp.html?v=20260417-long
It serves as a living archive — with detailed source notes, direct links, and a searchable index of videos if you want to explore specific ideas or follow a thread across episodes.
#magnetism #physics #electrodynamics #ampere #grassmann #electricity #science #historyofscience
00:00 Introduction
00:34 Ampère Direct Story
01:01 Grassmann
02:45 Grassmann's Solution
03:54 The First Cost
05:09 The Second Cost
06:55 Closing the Loop
