SPECTRUM ANALYSIS
\spˈɛktɹəm ɐnˈaləsˌɪs], \spˈɛktɹəm ɐnˈaləsˌɪs], \s_p_ˈɛ_k_t_ɹ_ə_m ɐ_n_ˈa_l_ə_s_ˌɪ_s]\
Definitions of SPECTRUM ANALYSIS
- 2006 - WordNet 3.0
- 2011 - English Dictionary Database
- 2010 - Medical Dictionary Database
- 1895 - Glossary of terms and phrases
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By DataStellar Co., Ltd
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The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
By DataStellar Co., Ltd
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The analysis of light by means of the spectrum produced by a prism. It has been shown that when a vapour sufficiently heated emits light of a certain refrangibility, the vapour at a lower temperature absorbs, i.e. refuses to transmit, light of the same degree of refrangibility. This principle serves to explain the dark lines of the solar spectrum. Thus, a certain line (D) has exactly the same degree of refrangibility as the light emitted from incandescent vapour of sodium; it is, therefore, inferred that incandescent sodium exists in the solar atmosphere, and stops the equivalent rays emitted by the more intensely heated body of the sun. A similar process can be applied to the other dark lines of the solar and stellar spectra, and thus some knowledge of the elements composing those bodies is arrived at.
By Henry Percy Smith
