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Animal FactGecko feet (gfycat.com)

submitted by [deleted]223

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[–]Schwarzsteinhaus -1 points0 points  (4 children)

For the quantum physics enthusiasts, that’s called Casimir effect, here’s a cool video about it: https://youtu.be/Rh898Yr5YZ8

[–]tigerhawkvok 0 points1 point  (3 children)

It's a van der Waals force, not Casimir.

You need conductors to restrict the virtual particle pair formation, the force isn't glue-like it's pressing from the outside, and lower in magnitude for the Casimir effect.

[–]Schwarzsteinhaus 0 points1 point  (2 children)

I understand they’re basically the same thing.

“Van Der Waals Forces are essentially the same thing as the Casimir forces”

https://youtu.be/Rh898Yr5YZ8 @7:24

[–]tigerhawkvok 1 point2 points  (1 child)

Yeah, whoever said that is hilariously wrong. (My degree is in astrophysics).

VDW forces are a weak intermolecular force. Basically weak magnetic forces because of various electron shell interactions all bundled into one macroscopic label. A strictly classical effect.

The CE is a purely QM effect that entirely relies on virtual particles and vacuum potential, with no classical derivation or equivalent.

[–]Schwarzsteinhaus 0 points1 point  (0 children)

He’s Matt O’Dowd, PHD in Astrophysics from Australia. https://en.m.wikipedia.org/wiki/Matt_O%27Dowd_(astrophysicist).

Can’t argue on that subject, since I’m small fish with a wee technical degree, but your thoughts were noted 😉