If you spread the light of a star out into a rainbow and photograph it, you have a spectrum of the star . 如果你把恒星的光分解为彩虹的颜色并且对它拍照，你就得到了恒星光谱。
The elucidation of these processes has been made possible in large measure by the investigations of molecular spectra . 分子光谱的研究，在很大程度上使我们有可能解释这些过程。
Exposure ratios between spectral bands are determined from in situ reflectance spectra of objects in scene . 光谱波段之间的曝光量比值，可以根据景物中目标的就地测定的反射光谱确定。
All intensity measurements using photometric units include a spectral bias (spectral response of the human eye) . 运用光度计装量进行辐射强度测量都应包括一个光谱的偏倚（人眼对光谱的敏感度）。
This effect is particularly important for leds since the emitted spectral width is several hundred angstroms . 这种效应对于发光二极管来说是特别重要的，因为发光二极管所发射的光谱带宽可达几百埃。
With the greater availability of lithium fluoride prisms, the use of this spectral range will probably be considerably extended . 由于更多地使用氟化锂棱镜，这个光谱区域的应用可能会有更大的发展。
Of the thousands of lines in the sun's spectrum, most can be definitely identified with those of elements known on the earth . 太阳光谱中的几千条谱线，绝大多数能确切地与地球上的已知的元素谱线相吻合。
A compromise must be reached between the "thinness" of the surface larger examined and the intensity of the infrared spectrum obtained . 应就被检测材料表面层的厚薄同红外线光谱强度之间的关系进行适当选择。
