Let's say you have a strong spherical neodymium magnet (for the purposes of this example, let's give it a 1 cm diameter), and you were to place it on a machine which rapidly rotates the magnet. If you were to rotate it at 100 MHz, could you build an FM radio transmitter? Supposing it were possible, if you were to increase the speed to 430 THz, will the magnet glow red? Has this experiment been done before? What is the highest rotation frequency without causing damage to the magnet?