@XxJerkFacexX Microwave: a wave within the electromagnetic spectrum, often used for transmitting signals across the globe. Can also be used for cooking food in microwave ovens, by heating the water molecules contained in food which thus heats the substance via method of conduction. Microwave ovens are more affective than stoves which use infrared radiation because of this reason as it is much quicker.
Hope that answers your question ;)