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§1-1 什么叫红外辐射在日常生活中,我们遇见过各种不同类型的辐射:如太阳光线、热辐射、无线电波及x射线等。看上去,它们的形式各不相同,但它们的本质都属于电磁辐射,也叫电磁波。它们之间的差别仅在于具有不同的频率或波长。我们可以按照频率或波长把各种类型的电磁辐射进行排列,即形成了所谓电磁波谱。
§1-1 What is infrared radiation? In our daily life, we have encountered various types of radiation: sun rays, thermal radiation, radio waves and x-rays. They appear to be in different forms, but their essence is electromagnetic radiation, also known as electromagnetic waves. The only difference between them is that they have different frequencies or wavelengths. We can arrange various types of electromagnetic radiation according to frequency or wavelength, that is, the so-called electromagnetic spectrum.