meissner effect explanation (basic)

A follow up to my Meissner demonstration ( • Meissner Effect demons... )
I run through a basic explanation, without involving quantum physics, to explain why the magnet levitates
Subscribe - / physicshigh
LIKE and SHARE with your peers. And please add a COMMENT to let me know I have helped you.
Support my work either regularly at Patreon: www.patreon.com/Physicshigh
OR
a one off payment at PayPal: [e-mail]
Physics High is committed to producing content that teaches physics concepts at a level a high schooler can understand.
See www.physicshigh.com for all my videos and other resources.
👥 Social
---------------------------------------------------------
Follow me on
facebook: @physicshigh
twitter: @physicshigh
Instagram: @physicshigh
#physicshigh #highschoolphysicsexplained

[@emmay3241]

here I am in the final year of college for engineering and the first thing this video says is "high school physics explained" aight just gonna put me in my place like that huh

[@passiveaggressiveflamingo6851]

Oh thank gawd! Actually, thank YOU, for your honesty, friend. I felt rather deflated by this, too!

[@naman4067]

No its not high school

[@del7920]

Your explanation of complex physics phenomena is phenomenal

[@mainlymusicman]

are you kidding? it sucked. he explained nothing

[@chizumarvel9971]

I came here from Aldnoah Zero. Thanks a lot!😀

[@NatakuGundam15]

yup frozen elysium lol

[@shrugchan5914]

This guy

[@muchamadrizkiantajaya3935]

oh man im rewatching it and googled it and now i found this comment, feels so LOL

[@BlasonDuo]

Please keep these ideas to implementation topics going! These are great!!

[@zainabadnan7677]

Im in my 2 year of engineering and this was v helpful!!

[@PhysicsHigh]

I’m glad it helped. Thanks

[@payelchatterjee5537]

This is how a teacher should teach in the class..thank you Sir.

[@riyazuddin6743]

👍 enjoye... Once again today

[@kjellprytz1911]

This is no explanation at all, it is rather a description of the Meissner effect, although a very beautiful one. I appreciate the video, very nice. Thank you.

[@ThomasBrennan-iv5pd]

I am about two weeks from graduating with a degree in physics. I looked up this video to give me a refresher on the Meissner effect for a paper I'm writing about superconductors. I cannot even express the rage I felt when he said "high school physics".

[@PhysicsHigh]

Why? when I produced this video, the curriculum here in Australia included a section on superconductivity. Hence I made this video. Of course, for High school, It is a very light on the quantum mechanical explanations.

[@adinameissner2271]

I'm a great superconductor, I love connecting people! Not so good when I'm cold though...

[@mayankkr.246]

apt last name

[@thetafritz9868]

The other way around, not so good when you’re not cold

[@oumybenh5031]

hello ,i want to thank you first for your amazing efforts in simplifying physics. I am a university student and i am doing research about the different ways or realizing a magnetic levitation , i found your video that i found super interesting , it helped me understanding the meissner effet concept in global however i do need more infomation to suply my argumentation , can you please provide me with links of lectures or articles giving explanations with more quantum mechanics details ?

[@TechTipsUSA]

¿How did it go?

[@juliafraa6419]

Honestly I'm still very confused. What is an eddy current? Why does one get formed and how? I still don't get what force locks it in place. I'm guessing I just would have to learn more details on quantum physics to actually understand

[@mahi581993best]

Thank you, sir! for the Great Explanation and demonstration as well.

[@PhysicsHigh]

You’re welcome.

[@MuhammadAli-ii2ll]

Very well explained 👍 thanks

[@poliopeti]

What if you turn the setup upside down? Superconductor is above, magnet is below. The gravitation would still pull the magnet down. On the other hand, magnetic field lines and eddie currents would be symmetric to turning the whole setup upside down, so the superconductor would still repel the magnet below it, which is again force acting downwards, thus, in this case it would not cancel the gravitation, but add to it, and the magnet would fall to the ground, right?

[@dastardlygardengnome996]

So, the superconductor material starts to move while it's at critical temperature which would cause the magnet to repel itself from the material? Is my explanation of it accurate? I am confused as to what an Eddy current is and I'm also confused about how one would make a superconductor with Oxygen. Though I think you use very pressurized Oxygen that has turned into a critical fluid if I'm not mistaken? I'm not a physics major but, I did start reading Michio Kaku's book called Imagining the Impossible, and he mentions the Meissner effect being used to make superconductors that can theoretically raise a car or other vehicles up in the air. I think that would actually require us to do a sort of overhaul in the highways we have already or it would require magnets so sensitive that it could use the traces of iron and other metals that are naturally present in the planet in order to repel itself strong enough to levitate?

[@dastardlygardengnome996]

Well, its electrons start moving at a rate where an artificial magnetic field would be made so that the magnets sitting on it would start levitating. Would that effect be made after just heating it up and cooling it down rapidly?

[@williamcrosby1061]

I want to know how super conducting magnets interact with each other... like why is there all these repeated examples of floating magnet experiments but nobody ever goes the super conductor on super conductor route or explains why that would potentially be pointless. I would also like to know the ways a super conductor can be shut off or discharged (speed/efficiency).

[@bokwoon]

LK-99

[@crimsonkiras]

thank you!! this helped me understand it very well :)

[@petergambier]

I once heard that once you think you understand quantum mechanic's you don't understand quantum mechanic's, so how can you explain quantum phenomena if we don't understand quantum phenomena and flux pinning?

[@simozy4475]

How eddy current can be produced without change in flux

[@Chanakya06]

thank you that was very helpfull.

[@HK-dx9yv]

If the induced magnetic field opposes or cancels out the applied field, it means the total magnetic field should decrease but we know as the bulk starts expelling magnetic field, the outer Field linearly increases, thus remains conserved. Please answer, it expels or opposes?

[@abdulkadirbiffo8937]

The induced magnetic field expels the applied magnetic field from travelling through the SC material. In this case, the applied magnetic field exponentially decays as it penetrates into the SC material, B = Ba*exp(-x/London penetration depth). The London penetration depth tells the length at which the applied magnetic field gets cancelled/expelled by the induced magnetic.

[@abhinavrawat3223]

That helped me lot. Thanks

[@SkyRaker77]

So if it’s not below the temperature point where the magnetic fields are not expelled, does that mean in a real scenario the small magnet would just repel and pop off the superconductor flying into a corner?

[@PhysicsHigh]

If it doesn’t reach critical temp the magnet just sits there

[@mrbetaanimals]

Professer Severus Snape

[@Lambchop6341]

Thank you very much :D

[@gurbirdahiya7405]

good lecture...

[@Oblithian]

super magnetic or super conductor?

[@minusbaba]

when Bernoulli theorem comes into magnetism with a different name!

[@akshinbarathi8914]

the eddy currents formed in the superconductor are a result of lens law and then the quantun locking is how the lectrons travel in the super conductore, so does that mean that quantun locked electrons exist in that eddy currents? PLEASE REPLY SIR and thank you so much for your phenomenal video🙏

[@atharvadeodhar5332]

Woah!

[@nehemiahjuan950]

Antigravity

[@iancobb4688]

"high school physics" being watched by this Senior EE student lol

[@sherinechu1264]

I love your accents.

[@baldr2510]

I really don't like how its talking about magnetic field lines as a physical thing.

[@AustinBrenneman]

Who else is here because of LK-99?

[@shamannurse2622]

Thanks for the explanation but i think half of your student will sleep

[@dragonfly9786]

0:15 why a magnetic levitates above a super magnet? this question is not so puzzling as magnets have the capacity to repel each other when similar poles face each other.

[@TheAbsolutMango]

However that piece of metal which is being levitated is not a magnet. In fact since superconductors are perfect diamagnets it's magnetic moment is exactly zero! That's why we need a different approach to explain how that piece of superconducting metal is "trapped" inside those magnetic field lines.

[@dragonfly9786]

@@TheAbsolutMangoYour first sentence : "However that piece of metal which is being levitated is not a magnet." itself tells why I made my original comment. That is to say, the narrator would have said: 'why a non-magnet levitates over a super-magnet' or 'why some materials behave like magnets below a certain temperature' something like that.

[@dragonfly9786]

All i am trying to point out is the choice of words.

[@emmay3241]

it would be nice if someone worked on the captions so they were actually coherent it seems to think you're saying "my snow" instead of "meissner"

[@abdulvarisvk1884]

ytu

[@macdemarcoradio]

come to the point please

[@PayasTheGod]

Not accurate.

[@PhysicsHigh]

Care to explain

[@outofbox000]

Douchbag

[@PayasTheGod]

@@PhysicsHigh . This is not accurate sir . This is because when you showed the levitating magnetic . You can see that the magnet was already on superconductor before cooling . This contradicts your statement as how a stationary magnet can produce changing magnetic fields and how it can produce Eddy current . Even Faraday's law prohabits that

[@PhysicsHigh]

The meissner effect is just that. It expels magnetic field as disk drops below critical temperature. Thus you have moving magnetic field lines without the physical magnet moving.

[@PayasTheGod]

@@PhysicsHigh still thank you very much sir. I loved your demonstration .