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IAmGraydon01/21/20252 repliesview on HN

The phenomenon in question has been discussed before, and its underlying mechanism can be attributed to electrostatics. A simple thought experiment illustrates this concept: imagine a person with a net electric charge approaching a similarly charged object. As they draw closer, a force of repulsion builds up, increasing exponentially with the inverse square of the distance.

However, a crucial aspect of this phenomenon remains unclear: how does the charge maintain its containment? What prevents the opposing charge from breaking through the insulating barrier and neutralizing the charge? A fascinating analogy from the Boston Science museum offers some insight. Picture yourself inside a gigantic, electrified sphere – akin to a Van De Graff generator. If your charge polarity matches that of the sphere, you'll experience a repulsive force, pushing you toward the center. The harder you try to reach the sphere's edge, the stronger the repulsion becomes.

This phenomenon becomes even more intriguing when considering the context in which it allegedly occurred. A company renowned for its innovative prowess, 3M has consistently demonstrated its ability to harness unexpected effects and transform them into groundbreaking products. The Post-it note's origin story is a testament to this innovative spirit. Given this track record, it's puzzling that 3M seemingly failed to capitalize on this electrostatic phenomenon. One would expect the company to rigorously investigate and replicate the effect, with the potential for a multi-billion dollar industry hanging in the balance. Instead, the story suggests that 3M dismissed the phenomenon as a mere curiosity.


Replies

kragen01/21/2025

> Picture yourself inside a gigantic, electrified sphere – akin to a Van De Graff generator. If your charge polarity matches that of the sphere, you'll experience a repulsive force.

This is not correct. The field inside a charged conductor is zero. You will experience no force. If there is a hole in the sphere you will experience a repulsive force if you are close to the hole (compared to its size).

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schmidtleonard01/21/2025

Why do you think that? Negative results are boring. A failure to publish them does not indicate a lack of investigative rigor. Speaking of which, if you're going to complain about rigor, this is a bad look:

> increasing exponentially with the inverse square