These fields are used to transmit information over long distances and form the basis of telecommunications as well as radio and television broadcasting all over the world. Microwaves are RF fields at high frequencies in the GHz range. In microwaves ovens, we use them to quickly heat food. Frequency and wavelength describe an electromagnetic field. Photons of electromagnetic waves at power and radio frequencies have much lower energy that do not have this ability.
Magnetic fields arise from current flow.
At radio and microwave frequencies, electric and magnetic fields are considered together as the two components of an electromagnetic wave. Low frequency and high frequency electromagnetic waves affect the human body in different ways. Electrical power supplies and appliances are the most common sources of low frequency electric and magnetic fields in our living environment. Everyday sources of radiofrequency electromagnetic fields are telecommunications, broadcasting antennas and microwave ovens.