Magnetic Radiation 99 (Medium)Edition 1 5. In his Magnetic Radiation series, Janiak reveals the hidden world of magnetism by photographing ferrofluids. A ferrofluid is a liquid substance magnetized through the introduction of iron particles. Janiak introduced magnetic forces to the ferrofluid, moving the magnets into different configurations to cause the colloidal mixture to assume various forms that reveal the otherwise invisible nature of magnetic activity. The forms reveal