...what's new on that ? An electric dipole inside a uniform electric field is subjected to a torque and, rotating, it takes orientation accordingly to the direction of the uniform electric field. Substitute the uniform electric field with a pulsant one and the dipole with start to rotate continually as long as the electric field changes direction and while rotating the frictions against other dipoles around it will raise its temperature. It's like that that foods are cooked thanks to microwaves principle..... Atoms can behave like dipoles and high frequencies of electromagnetic waves can be dangerous for that reason. It's the discovery of hot water....I always keep the cellular away from me, when I can and I don' t like wireless technology although someone will say......we're all inside these high frequency fields due to wireless ADSL, both that we like it or not.