. A detailed investigation of the absorption by water of electromagnetic radiation. Electromagnetic waves; Absorption spectra. 13 By comparing Hulbert's work with that of Burt , it may be seen how very pure ocean water is. Burt measured extinction of light in Chesapeake Bay caused by suspended particles. He concluded that particle concentration ranges from 1 to 60 parts per million by volume and that the average particle radius is 6x10"^ cm. Since coastal water is much less absorbing than bay water, it may be concluded that it is very dust free and contains much less than the 1 part per m
. A detailed investigation of the absorption by water of electromagnetic radiation. Electromagnetic waves; Absorption spectra. 13 By comparing Hulbert's work with that of Burt , it may be seen how very pure ocean water is. Burt measured extinction of light in Chesapeake Bay caused by suspended particles. He concluded that particle concentration ranges from 1 to 60 parts per million by volume and that the average particle radius is 6x10"^ cm. Since coastal water is much less absorbing than bay water, it may be concluded that it is very dust free and contains much less than the 1 part per million of suspended particles than was used in the example of the section, Absorption Pro- cesses at Very High Frequencies. The best measurements of infrared absorption seem to be those of 14 Plyler and Acquista whose results are graphed below. These authors used a Perkin-Elmer double beam spectrometer and three different sample thicknesses of water. 100 80 60 40 20. 10. Liq H2O %T. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Fabricand, B. P; United States. Office of Naval Research; Columbia University. Hudson Laboratories. Dobbs Ferry, N. Y. : Columbia University, Hudson Laboratories
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