Diamagnetic Water Experiment Part 1

An experiment to show the diamagnetic properties of water.
We're using a neodymium magnet taken from a computer hard disk. Put it inside a shallow dish and fill it with water so the magnet is covered with aprox 1mm of liquid. The reflection of any light source over the water surface will show if this surface is still flat or not. As seen in this video, it's demonstrated that the water surface is no longer flat over the magnet. As the water is repelled by the magnet a slightly convex bulge is formed over it.

Category:

Science & Technology

Tags:

• neodymium magnets
• diamagntism
• diamagnetic water
• experiments with magnets
• magnets
• hard disk magnets

[cervantesphantom]

@gbcarr14: Estimado amigo,'NO es la reflexión de los bordes brillantes del imán" y SÍ la curvatura de la superficie del agua por causa del diamagnetismo de la misma. Pero vamos a hacerla más fácil, no me creas, verificalo vos mismo! Desarmate una disco rígido viejo de PC, sacale los imanes al brazo lector de los discos y repetí el experimento... Después me contás a qué conclusión llegaste. (Un experimento vale más que mil palabras) ¿Que té parece? ¡Un abrazo! Andrés.

[robinson1509]

It would be interesting to see an experiment that shows the effect of the water temperature on the distortion.

[cervantesphantom]

@robinson1509 take a look at info.ee.surrey.ac.uk/Workshop/­advice/coils/mu/ It seems there's no dependance between temp and diamagentic properties of water.

[robinson1509]

Is the water distilled? Is the distortion relative to the conductivity?

[cervantesphantom]

@robinson1509 Hi Robinson! Nope, the water is not distilled. There's no need for that, just tap water. That's all.

Thr distortion has nothing to do with conductivity but with them magnetic properrties of matter.

As yoi know water is diamagnetic which means under a powerful magnetic field it develops its own field with such polarity as to repel the main field. Thus a little bulge appears over the magnet (a convex bulge). Got the idea?

If it were ferromagnetic it would be a concave bump.

[cervantesphantom]

@irrah77: Thanks!.

Sometimes the most simple experiments bring the clearest insights! Regads, Andy.

[gbcarr14]

A mi me parece que es una reflexión en los bordes brillantes del imán y no una curvatura de la superficie del agua, por más que además esta podría estar causada por tensión superficial y no por las propiedades magnéticas del agua

[irrah77]

beautiful and simple observation !

[cervantesphantom]

@kamalmichael

be sure to use a powerful magnet, like the ones found in Hard disk drives.

[kamalmichael]

love u r idea 2 test