We'll assume that the question refers to a "microwave oven".
The food in a microwave oven is cooked with a field of high-power radio energy at a
frequency of 2.45 GHz (wavelength of 12 centimeters), that fills the box.
Radio waves and microwave.
Microwave signals are being sent through space through electromagnetic waves and not through optical waves. This type of signal is being used mainly in communications because of its narrower beams compared to other signals.
Microwave (portion of EM Spectrum lying between radio wave and infrared wave).
Longitudinal (radio) waves are the type of waves used in radar, and they are microwave frequency waves, which are high frequency and have short wavelengths.A link is provided to the Wikipedia article on radar. You can surf on over and check it out. A link is also provided to a related question.
Radio waves - in the microwave section of the electromagnetic spectrum.
Inches (microwave) vs. Feet (Radar).
Microwave cookware can be made from a variety of materials. The biggest material used is polypropylene to make microwave cookware. Glass and organic minerals can also be used to make microwave cookware.
Radio waves , at a frequency of 2.5 GHz, and very high power.
Many different types can be:sound waves in airelectrical waves in wireselectromagnetic waves (e.g. radio, microwave, infrared, visible light)etc.
Roughly within an order of magnitude or so, either way.
Roughly within an order of magnitude or so, either way.
Roughly within an order of magnitude or so, either way.