. A detailed investigation of the absorption by water of electromagnetic radiation. Electromagnetic waves; Absorption spectra. As an example, the back scattering cross-section of a sphere of dielectric constant e and infinite conductivity for a/X. « 1 is given by only the dipole terra ira xlO It is seen that this is the famous Rayleigh scattering which accounts for the blue color of the sky. Fig. 1 shows a plot of this cross-section vs a/\.. / a The 1 7- j or Rayleigh scattering is shown by the dotted line„ It coincides with the solid curve for a/\ « 1. At about a/X. - „05, higher order multi-
. A detailed investigation of the absorption by water of electromagnetic radiation. Electromagnetic waves; Absorption spectra. As an example, the back scattering cross-section of a sphere of dielectric constant e and infinite conductivity for a/X. « 1 is given by only the dipole terra ira xlO It is seen that this is the famous Rayleigh scattering which accounts for the blue color of the sky. Fig. 1 shows a plot of this cross-section vs a/\.. / a The 1 7- j or Rayleigh scattering is shown by the dotted line„ It coincides with the solid curve for a/\ « 1. At about a/X. - „05, higher order multi- pole terms become larger and fluctuate in phase and magnitude causing the oscillations^ As a/\ becomes larger, a approaches the geometrical cross-section. As a sample calculation, suppose water containing one part per million by volume of infinitely conducting spheres scatter radiation of wavelength ° o _4 6000 A (visible region). For radii of 12000 A (^ 10 cm) the scattering 2 cross-section is about geometric, wa „ The mean free path for this radius is / 2 given by 1/n va where n is the number of scattering particles per cubic 5 centimeter (2,5x10 in this case). Its value is 130 cm. Experimental results pertaining to the clarity of ocean water will be discussed 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
Size: 2211px × 1130px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, bookleafnumber17
