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levitating frog

Name: levitating frog
Description: A short clip of a frog levitating inside a roughly 10 tesla magnetic coil, demonstrating diamagnetism.

Graham McLeod

Demos

YouTube

1 HN user recommended this demo1 month2012–2014 score 1

Years with an HN recommendation, 2007–2026

Cited as the canonical eye-catching demo of diamagnetic levitation, and sometimes used as a joke in magnet threads.

A short clip of a frog levitating inside a roughly 10 tesla magnetic coil, demonstrating diamagnetism.

“If you think that's cool you should have a look at this frog” (HN, 2014)

1 recommendations · 2 jokes · Demos

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3 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@ThePhysicist Feb 2014 Recommends

on HN thread What Happens When You Drop A Magnet Inside A Copper Tube [video]

If you think that's cool you should have a look at this frog: [this video] The physics behind this are explained here: [link]

A levitating frog demonstrating diamagnetism

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Citations, criticism and jokes

@onemoreact Mar 2012 Makes a joke

on HN thread Body Hacking: Thoughts Regarding My Magnet Implant

Thanks for that, I suspect infection is still probably a more serious risk overall, but a 4+T MRI does give me pause. PS: Then again at 10T you get to fly so it may still be worth the risk. [this video] ;-)

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@Retric May 2013 Makes a joke

on HN thread School experiment finds cress won’t germinate near router (Danish)

I would point out these are rather subjective measurements. In that a person is physically looking though a microscope and making a judgement call. Worse, sperm are highly impacted by temperature and negative studies get little attention and often don't get published. Why such attention? Well in most cases the radiation needs to go through your freaking leg which if your cells are absorbing this em radiation should act as significant shielding for some vary weak radiation. Compare this to this plant experiment which is blatantly obvious. PS: And just for fun, compare with the unharmed levitating frogs. [this video]

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