Rating is available when the video has been rented.
This feature is not available right now. Please try again later.
Published on Feb 24, 2010
This video shows a piece of carbon floating on top of 4 magnets. This is possible because graphite is a strong diamagnetic material, which, in the presence of a magnetic field, produces an opposing magnetic field. It can hover stably because the magnets have alternating poles pointing upwards (N-S-N-S clockwise). The carbon rod is just an ordinary 0.5mm pencil filling. The magnets (5x5x5 mm) are made from neodymium (NdFeB). The rod is poked with a small wooden stick and eventually flies away from the magnets (also in slow-motion). It was taken through a stereo microscope at 20x magnification and played at normal speed (except for the final slow-motion), with top lighting.