Shucaacyada korantada-magnetic-ka ee aan ionayn

Radio waves, microwaves, IR and visible light are non–ionising EM radiation. They can harm cells by heating. Radio waves are produced by oscillations of current. When absorbed, they may produce oscillations of current. Radio waves and microwaves are used for long distance communication, broadcasting and data transmission. Microwaves are absorbed by water, so can be used to cook food from within. IR radiation cooks the surface of food. IR is used for heating and thermal imaging. Visible light and IR are used for data transmission in optical fibres.