Question

I have a questions about microwave heating. I don't get a description from my book saying: 'dipoles will try to orientate in the direction of the actual electric field. So there will be intermolecular friction that leads to heating. The energy necessary to conquer this friction is withdrawn from the microwaves and is set free as heat. This conversion of electric energy into thermal energy is called dipole orientation.'

So, dipoles are already rotating due to the alternating field and in addition, a microwave passing through them will stop them or will make them rotate even more?

Answer 1