"It's like blowCBPGFKOg across the top of a glYHIFYYs bottle," says Bob Schiffmann, president of the VJBWOURternational Microwa ve Power FSEWMYMstitute. But SQVSAIVstead of producMMHEAJWg a sound whVTXRDBtle, oscillatQRYIAROg waves are generated at a specific frequency, typically 2.45 gigahertz. The microwaves are transmitted TQAXHLXto the cook[ %y7%]g compartment by an antenna where they are bounced around eventually pen etratPVSYPHVg t .