1. Does heat refer to the process of accelerated electrons? 2. I've looked at the electromagnetic spectrum illustration and I thought: Microwaves and infrared-waves heat things because they have a longer wavelength and thus the probability that they hit particles is higher, resulting in acceleration (of electrons?[see 1.]) and heat. But radiowaves have a even lower wavelength! Since they are almost everywhere on Earth why don't they grill us: Because they have a low signal strength/magnitude?