Microwave refers to the electromagnetic wave with the frequency of 300MHz~300GHz. It is the abbreviation of a limited frequency band in the radio wave, that is, the electromagnetic wave with the wavelength of 1 mm~1 m, and is the general name of decimeter wave, centimeter wave, millimeter wave, and submillimeter wave. Microwave frequency is higher than general radio wave frequency, which is also called "ultra-high frequency electromagnetic wave". As an electromagnetic wave, microwave also has wave particle duality. The basic properties of microwave are usually characterized by penetration, reflection and absorption. For glass, plastic and porcelain, microwave almost passes through without being absorbed. For water and food, it will absorb microwave and make itself hot. For metal objects, microwave will be reflected.

Citation explanation

   1. Tiny waves. Liu Xiang of the Han Dynasty, in his New Preface, Miscellaneous II, said, "Lead the fiber to pay, raise the microwave, and break the breeze and die." Tang Xuhun, in his poem "Pan Wu Yun Xi", said, "The rapid wrasse chirps its axle, and the microwave ripples its fishing tube

   2. Still lingering. Sima Xiangru of the Han Dynasty, in his "Fengchan Wen", said, "Let all the people in the world enjoy a clear flow, raise the microwave, become famous among the elites, and be vigorous." In the volume of the "Poetry" by Liang Zhongrong of the Southern Dynasty, "In Yongjia, you value the old and the yellow, and you still talk a little. In the time of writing, you can sort out the words, which are less than tasteful, so you can reach the surface of the river, and the microwave is still popular." In the volume of Preface to "A Collection of Records of Sheltered Cottage", "you can look up at the scenery and stop, and you can only express your thoughts on the microwave."

   3. Refers to a woman's eye waves. The Ode to Luoshen by Cao Zhi of Wei of the Three Kingdoms Period: "The unscrupulous media use the microwave to communicate with each other." Huang Zunxian of the Qing Dynasty wrote Duyou Song: "Some people use the microwave to communicate with each other, and the lotus! I can bring my hairpin phoenix to my emerald snail, and the lotus!" Gao Xu wrote in his poem "Gives Shen Xiaoze": "A melancholy beauty leaves a picture, and is willing to trust the microwave with her thoughts."

   4. Physical terms. Refers to electromagnetic wave with shorter wavelength. For example, in radio communication, it refers to the electromagnetic wave with a wavelength between 1mm and 1m.

Microwave wavelength

The frequency of microwave is between 300MHz and 300GHz, and the wavelength is between 1 meter (excluding 1 meter) and 0.1mm. It is a general term for decimeter wave, centimeter wave, millimeter wave and submillimeter wave. Microwave frequency is higher than general radio wave frequency, which is also called "UHF radio wave". As an electromagnetic wave, microwave also has wave particle duality. The energy of microwave quantum is 199 × l0 -25～ 1．99 × 10-21 joules.