Since the magnets have an inhomogenous field any diamagnetic material is being repelled away from the magnet. As water is diamagnetic, the magnet is able to form a small depression in the water. This depression deflects impinging beams from far away differently than the otherwise flat water surface.
I am not really sure. I believe Neodymium-something magnets. But supposedly up to 1 T magnetic field. However I am not sure if they indeed reach it. In principle from the water deflection the force could be calculated and of course then the magnetic field but I am very far away from an "exact" deflection measurement...
I believe Neodymium-something magnets.
But supposedly up to 1 T magnetic field.
However I am not sure if they indeed reach it.
In principle from the water deflection the force could be calculated and of course then the magnetic field but I am very far away from an "exact" deflection measurement...
However, the effect is only barely visible, even with those ultra strong permanent magnets.