Rhythmic Ferrofluid: an iridescent magnetic fluid interacts with a variable strength electromagnet (like those found in speakers). A circuit supplies power to the electromagnet in proportion to the sound waves picked up by a microphone, the changing magnetic field- combined with the liquid surface tension of the colloidal ferromagnetic liquid- produces the captivating motion that keeps time with any music played. ➡️ Follow the link in my @physicsfun profile for info on where to get this device a

Spirok Rhythmic Ferrofluid: electromagnets produce changing fields to make a ferrofluid dance. I’ve posted similar devices, but this one takes the art form to the next level- and includes a quality Bluetooth speaker system. Ferrofluids are colloidal suspensions that are challenging to contain in a non-chemically reactive environment, the fluid in this device is really amazing- shown here moving to the rhythms of Tahüm. ➡️ Follow the link in my @physicsfun profile for info on where to get this de

Watch magnetic fields with ferrofluid in a bottle 😮😮 | Magneticgames