每天人们利用微波做各种事——从监察高速行驶的汽车或烹调食物到卫星通讯。微波是波长一毫米到一米范围内电和磁一起成波状形传播的电磁场,可被发送、传播和吸收。微波炉就是利用了这三种作用,它比普通炉烧煮食物要快几倍。微波炉工作原理如下:微波炉内磁控管把电转变为微波,微波通过电子枪被发射到空心的波导管里,通过波导管不断地传送到象风扇般转动的搅拌器, Every day people use microwaves to do everything from monitoring high-speed cars or cooking food to satellite communications. Microwaves are electromagnetic fields propagating waveforms of electricity and magnetism within a range of one millimeter to one meter of wavelength and can be transmitted, propagated, and absorbed. Microwave ovens take advantage of these three effects, which are several times faster than normal oven cooking. The working principle of the microwave oven is as follows: the magnetron in the microwave oven converts the electricity into the microwave, the microwave is emitted into the hollow waveguide through the electron gun, and is continuously transmitted to the fan-like agitator through the waveguide,