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1.何谓光谱? 答:复色光经过色散系统(如棱镜、光栅等)分光后,按波长(或频率)的大小依次排列的图案。例如,太阳光经过三棱镜后形成按红、橙、黄、绿、青、蓝、紫次序连续分布的彩色光带。红色到紫色,相应于波长由7700—3900埃的区域,是为人眼所能感觉的可见部分。红端之外为波长更长的红外光,紫端之外则为波长更短的紫外光,都不能为肉眼所觉察,但能用仪器记录。因此,按波长区域不同,光谱可分为红外光谱、可见光谱和紫外光谱;按产生的本质不同,可分为原子光谱、分子光谱;按产生的方式不同,可分为发射光谱、吸收光谱和散射光谱;按光谱表现形态不同,可分为线光谱、带光谱和连续光谱。光谱现象的研究已成为一门专门的学科,即光谱学。
1. What is spectrum? A: The complex color light through the dispersion system (such as prism, grating, etc.) after the light by the wavelength (or frequency) of the size of the order of the pattern. For example, the sunlight through the prism to form a red, orange, yellow, green, blue, purple sequence of continuous distribution of color light. Red to purple, corresponding to a region of wavelengths from 7700 to 3900 Angstroms, is a visible part of the human eye’s senses. Outside the red end is a longer wavelength infrared light, while the violet end is a shorter wavelength ultraviolet light, which can not be perceived by the naked eye but can be recorded by the instrument. Therefore, according to the wavelength region, the spectrum can be divided into infrared spectrum, visible spectrum and ultraviolet spectrum; according to the different nature of the generated can be divided into atomic spectroscopy, molecular spectroscopy; according to different ways, can be divided into emission spectrum, absorption spectrum and Scattering spectrum; according to the different spectral manifestations, can be divided into line spectrum, band spectrum and continuous spectrum. The study of spectral phenomena has become a specialized discipline, namely spectroscopy.