“I love the way they explain it”
Modern explanation of magnetism via special relativity.
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Here some modern explanation of the phenomena: (I love the way they explain it) "How Special Relativity Makes Magnets Work" this video .
How Special Relativity Makes Magnets Work
4M views · Sep 23, 2013 · 4:19 · 7 HN recommenders · 8 mentions · discussed 2014–2024
Veritasium explains magnetism as a consequence of special relativity. Length contraction of moving charges makes a current in a wire attract or repel a nearby moving charge.
Why Hacker News points people here: HN commenters recommend it as a short, clear explanation of why moving charges create magnetic fields.
“if you are curious why a moving charge creates a magnetic field watch this Veritasium video”HN comment, 2021
What Hacker News said 8
“Here is a pretty good video explaining magnetism as a relativistic effect of electrostatics”
Explains magnetism as a relativistic effect of electrostatics.
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That's right. Here is a pretty good video explaining magnetism as a relativistic effect of electrostatics - this video
“Here's a video explainer”
Video explainer on magnetic fields across reference frames.
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Here's a video explainer: this video Magnetism affects moving charges, but not stationary charges. A magnetic field in your reference frame is really just an electric field in the moving charge's reference frame.
“Veritasium on YouTube made a much better explanation”
Much better explanation of magnetism as a relativity side effect.
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Magnetism is a side effect of special relativity: moving charges have length contraction (depending on frame of reference) which makes them appear more/less dense and therefore an attractive/repulsive force. Veritasium on YouTube made a much better explanation: this video
“if you are curious why a moving charge creates a magnetic field watch this Veritasium video”
Explains why a moving charge creates a magnetic field.
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Wow, this is the first time I have understood why nothing can go faster than the speed of light and why time dilation is a thing. A very easy to read article, give it a try. Also if you are curious why a moving charge creates a magnetic field watch this Veritasium video: this video
“And why magnets work due to relativity”
Explains why magnets work due to relativity.
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Sort of, electricity and magnetism are two sides of the same coin, electromagnetism, so it's waves in the electromagnetic field with the wire acting as a wave guide. (as far as I understand) Veritasium has a video that goes over this. It was pretty controversial at release but it gives a good overview. link And why magnets work due to relativity this video
“Here is a simple explanation”
Simple explanation of magnetism as emergent from electric field and relativity.
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I think what GP meant is that (from one viewpoint) magnetism is an emergent property of the electric field and relativity. Here is a simple explanation: this video
“This video also talks about it”
Video also explains magnetism as a relativistic effect.
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Another fun fact: Magnetic fields are a consequence of relativity and length contraction of electric fields. link This video also talks about it: this video