<P> The super-high frequency ( SHF ) and extremely high frequency ( EHF ) of microwaves are on the short side of radio waves . Microwaves are waves that are typically short enough ( measured in millimeters ) to employ tubular metal waveguides of reasonable diameter . Microwave energy is produced with klystron and magnetron tubes , and with solid state diodes such as Gunn and IMPATT devices . Microwaves are absorbed by molecules that have a dipole moment in liquids . In a microwave oven , this effect is used to heat food . Low - intensity microwave radiation is used in Wi - Fi , although this is at intensity levels unable to cause thermal heating . </P>
<P> The super-high frequency ( SHF ) and extremely high frequency ( EHF ) of microwaves are on the short side of radio waves . Microwaves are waves that are typically short enough ( measured in millimeters ) to employ tubular metal waveguides of reasonable diameter . Microwave energy is produced with klystron and magnetron tubes , and with solid state diodes such as Gunn and IMPATT devices . Microwaves are absorbed by molecules that have a dipole moment in liquids . In a microwave oven , this effect is used to heat food . Low - intensity microwave radiation is used in Wi - Fi , although this is at intensity levels unable to cause thermal heating . </P>
where does wifi fall on the electromagnetic spectrum
where does wifi fall on the electromagnetic spectrum
Low - intensity microwave radiation
Low - intensity microwave radiation