Ever wonder how a microwave works?
Microwaves cook food quickly because they heat the molecules in food directly through radiation. That radiation is a form of electromagnetic (EM) energy—waves of energy that travel through space.
The different types of EM wave energy, such as radio waves and light waves, are shown on the electromagnetic spectrum.
The spectrum organizes different types of EM waves according to their wavelength. Wavelength is a measure of distance.