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Questions tagged [levitation]

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3answers
69 views

Is it possible to create a magnetic environment where it pushes and pulls at the same time, making the target “levitate”?

To better understand why I ask this, the backstory is I’m getting more and more annoyed by rolling office chairs rotating, hitting my ankles, hard to switch directions when wheels having ~90 degrees ...
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0answers
16 views

Dynamic electrostatic levitation

There are many examples of electronic magnetic levitation devices. These generate variable strength magnetic fields to keep an object levitated above a base. For example https://www.youtube.com/...
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4answers
80 views

Is it possible to use forces on a current carrying conductor due to Earth's Magnetic field to levitate?

When current is applied, a conductor within a magnetic field feel a force. This is the Lorentz Force. I was thinking if it is then possible to apply as much current on a conductor that it will start ...
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0answers
21 views

Is passive magnetic levitation without moving parts possible without the use of diamagnets?

So, I looked at the Wikipedia page on magnetic levitation and it described lots of ways of levitating things magnetically, but they were all stabilized by either electronic feed-back loops, ...
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0answers
28 views

Could the ITER central solenoid lift an aircraft carrier 2 m into the air?

This claim is made in many places around the internet, presumably repeated from an ITER press release. But are there caveats? Does the aircraft carrier need to be in water (so only the no-longer-...
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0answers
21 views

Magnetic levitation using Eddy currents

I was watching Walter Lewin's lectures; https://www.youtube.com/watch?v=rLZLa-fyt1w&list=PLyQSN7X0ro2314mKyUiOILaOC2hk6Pc3j&index=20 He talks about magnetic levitation in the following way: ...
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1answer
29 views

Energy required to levitate an object

How much energy is required to maintain a $m$ kilogram body $h$ meters above sea level for a period of $ t$ seconds?
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1answer
294 views

How strong of a magnetic field would I need to lift a human?

I know that there was that experiment they did to lift a frog by using the diamagnetism of the water in it's body, but how strong of a magnet would you need to lift a human in the same way? To lift ...
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1answer
41 views

How fast can we spin a large-diameter ring levitated by a well-designed and uniform magnetic field before running up against the laws of physics?

Assume that air-friction can be ignored. Assume that magnetic levitation supports the spinning ring so that hoop stress in the ring is not a limiting factor. Assume that "large-diameter" ...
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4answers
338 views

Defying gravity with vertical shaking?

I saw this video on levitating a denser liquid on less dense air by vertical shaking. But I couldn't understand some points in the video. Particularly: How did the liquid levitate? I think it's ...
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0answers
35 views

What determines the height at which a superconductor hovers? [duplicate]

What determines the height at which a superconductor levitates? Can you just place it randomly in the magnetic field? What are the limits of superconductors?
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1answer
75 views

Will superconductor levitate on Earth magnetic field?

We know the earth has both gravity and magnetism (which is very weak). Geomagnetism starts at the south pole and ends at the north pole. If I take a large sheet of superconducting material (very thin ...
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2answers
84 views

Is levitation possible through this apparatus?

If we had two rigid sheets which were exactly identical and we had the magnets on it as shown in the figure, then would the top sheet float above the bottom, which is fixed on a rigid surface. The ...
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1answer
88 views

Magnetic levitation using permanent magnets

Is it possible to achieve magnetic levitation (rail) using permanent magnets? So no electromagnets or superconductivity. If yes, how? If not, why not?
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2answers
166 views

Explain hydrodynamic Levitation

I had researched it and I saw everyone has there different answer. Someone says its Magnus effect, someone says it is Coanda effect and someone says its Bernoulli's principle. Can it be specific? What ...
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0answers
85 views

What is the approximate air pressure in acoustic levitation caused by the sound pressure? [closed]

I'm wondering how the sound pressure in acoustic levitation affects the actual air pressure within the standing wave. I've read that several atmospheres of air pressure can be caused by ultrasonic ...
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1answer
62 views

How do superconductors levitate magnets without oscillation?

For an electromagnet to effectively levitate a permanent magnet underneath it without external support structures, the electromagnet must be oscillating within a delicate range. I've heard that ...
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6answers
7k views

Could there theoretically exist a material so light, that it can levitate in the air just due to the in height decreasing air pressure? [closed]

Airplanes can fly because the pressure on the top of the wing is lower than on the bottom. But the difference in pressure must be huge in order to lift an enire airplane. Also, the difference in air ...
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3answers
3k views

Earth magnetic field space elevator. No cable [closed]

I have an idea that the space elevator can be build in the following conditions: Not a classic theory. No cable. No Geostatic orbit. Not equator platform position The possible platform / base ...
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1answer
20 views

How does the change in helium distribution affect a floating balloon

I was wondering if we change the distribution of the helium gas inside a balloon, like if we trap it inside chambres or something, does that affect the overall levitation capacity of the balloon? ...
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0answers
36 views

Can a magnetically levitating sphere spin in any direction?

I am trying to design a system that levitates a sphere (ball). I have found several solutions, however, it seems to me that the levitating ball only has one degree of freedom, i.e. rotation around the ...
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1answer
467 views

Sound Waves Moving Large Objects?

I recently read an article over using sound to move/levitate objects in mid air. Which is basically using sound to go against/defy gravity. For Many years Physicists have been able to move smaller ...
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1answer
40 views

Optical trapping: factor 1/2 in definition of gradient force and potential energy?

If one consider the original deduction of the gradient forces that is applied to the trapped particle we can find the following: $$F_{grad}=\frac{1}{4} \alpha \nabla E_0^2(r),$$ where $E_0(r)$ is an ...
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1answer
54 views

Enhance magnetic field for a levitating plant [closed]

Problem I bought a levitating pot and it looks great! But I wonder if I can enhance the magnetic field somehow. Potential solution I thought of wrapping the base (which produces the magnetic ...
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2answers
423 views

Magnetic levitation against Earnshaw's Theorem?

Given six strong magnets, what if we fix three of them to a table in a simple, horizontal, equilateral triangle-like formation (with their north poles sticking up), and the other three to the points ...
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2answers
195 views

Air pressure levitation

How much mass can you levitate with air? Take air hockey table for example, pressurised air is pushed through holes and they levitate a disk but how much mass is possible? I think it would probably ...
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1answer
643 views

Can the Earth's negative charge make negatively charged objects levitate?

Since the earth's surface has a negative charge, could it repel a large highly negatively charged body? An example is an object on stilts carrying a negative charge that is heavier than air, maybe ...
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2answers
762 views

If I use a magnet to levitate another magnet, where is the energy coming from?

Imagine I use one static magnet to levitate another magnet indefinitely. This levitating magnet is in a narrow tube that wont allow it to rotate and get attracted. So it will keep levitating forever, ...
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1answer
66 views

Behavior of liquid droplet in stream of gas

Hail to all magnificent physicists from a humble chemist! :) I'm working on an experimental setup for investigation of homogeneous nucleation and crystal growth in container-free environment. Well, ...
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2answers
4k views

Any solutions to Veritasium's hydrodynamic levitation?

So this Youtube video has been around for a while now Veritasium Hydrodynamic levitation! . Also these questions Fluid Mechanics explanation of an object levitated next to an air jet and Explain ...
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3answers
3k views

Can compressed air be used to make an object "float?"

Imagine a container filled with highly pressurized air. Now imagine that there is some object, maybe a marble, inside the container. Is it possible to cause the marble to "float" within mid-air, due ...
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1answer
1k views

Magnetic levitated electric wire

I'm thinking about making an instrument to show the force on a wire carrying electric current for students in lab. A normal wire which levitates from ground after it has current flowing in it. We ...
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2answers
1k views

Halbach array and levitation

Full disclosure: I am a total novice when it comes to physics apart from being very curious and basic physics classes at school level (long long ago). Using 16 mm diameter disc magnets. I am ...
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1answer
107 views

Levitation, no levitation or instable levitation?

(forgive me any grammatical flaws, english is not my native language) hello, i know that according to Earnshaw's theorem a stable levitation cannot exist by only using permanent magnets. Similar ...
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1answer
86 views

Are quantum locked things slowed down by air resistance?

Me and my friend had an argument today whether Quantum Locked objects are slowed down by air resistance? He says that it isn't, that the magnetic field or something removes the air resistance. Could ...
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1answer
202 views

Levitating Magnet Experiment [duplicate]

i want to make a levitating device with magnets. now i have some ideas but i don't know the math to work the numbers out. here is what is want to do : so the idea is basically to lift a device (about ...
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2answers
77 views

Does a field weighs something?

Imagine you put a magnet on a scale and you could manage to keep another magnet with the same pole above it. So the upper magnet is floating above the other one with a magnetic field in between. Does ...
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0answers
249 views

How does the "lifter"/ionocraft device work? [closed]

A while ago I watched a documentary which at the end (don't let the name mislead you, I'm asking about a perfectly real phenomenon) shows an experiment which its inventor calls a "lifter"/ionocraft. ...
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1answer
2k views

Could a man float in a large enough magnetic field to simulate zero gravity? [duplicate]

I know the magnetic field would need to be very large, but if an organisation like NASA with huge funding and resources could build a large enough device, could a man float in that magnetic field to ...
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1answer
10k views

How does the levitating water illusion work?

After watching a movie in which levitating water was used as an illusion, I was curious to discover how it works. Unfortunately I cannot find any great explanations of the science behind the effect, ...
3
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1answer
789 views

Can we use radiation pressure to push/levitate a human?

I want to know, at least in theory, are there any safe em wavelength that could affect human body as net force and do no harm? To put it bluntly I want to know is it possible for levitate a human on ...
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2answers
911 views

Levitation inside a solenoid

Is it possible to levitate something inside a solenoid? If yes, is it possible in any direction (horizontal, vertical)? Also, is it possible when an object is traveling through? Thanks in advance!
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1answer
1k views

Could I pick up a human with a strong enough magnet? [duplicate]

Could I pick up a human with a strong enough magnet? Humans contain magnetic materials, such as iron.
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1answer
302 views

Is it possible to levitate large objects through diamagnetic levitation?

I am currently building a diamagnetic levitator with a strong neodymium magnet, two slabs of bismuth (a diamagnetic material), and a small neodymium cube to levitate. However, I was wondering if it ...
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4answers
8k views

Can lasers lift objects?

I have been fascinated by a very intriguing question - Can lasers push objects up? I have done the below math to find out Lets say we have a $1000~\text{mW}$ laser and we would like to lift an ...
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0answers
232 views

Stabilizing a shaft with only one electromagnet

I have recently come across Earnshaw's theorem in my research which states that it is not possible to stabilize an object using only static permanent magnets. I understand that and it makes sense to ...
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1answer
760 views

Could Earth's magnetic field be used to lift electromagnets? [closed]

This but lifted by the Earth's magnetic field.
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2answers
146 views

Can Acoustic levitation be used to contain antimatter?

Can Acoustic levitation be used to contain antimatter? To me, It sounds like an obvious use of the phenomenon, but I didn't find any documentation about anyone trying this on the web, which could ...
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0answers
998 views

Magnets levitation stability

I'm willing to make a levitating stand based on standard magnets. Both the stand itself and the levitating object would have magnets attached, of course the same poles heading each other. I have two ...
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0answers
184 views

Superconductors and hoverboards

We know that superconductors are repelled by magnetic fields. The earth has a magnetic field of about $10^{-5}$ Tesla. I just want to know if it is possible to use this property of earth to make hover-...