An important distinction between the optical and radio regions of the electromagnetic spectrum is the statistical one. As the wave length of radiation becomes shorter one has less and less detailed knowledge of the positions and phases of the radiating elements. In the radio region this knowledge is for all practical purposes absolute; in the optical region it is almost entirely statistical. The experimental techniques in the two regions are markedly different both as to mode of generation and mode of measurement of the radiation. For a long time it has appeared desirable to close the gap experimentally in the sense of producing effective millimeter wave generators. From a theoretical standpoint, the existence of a similar gap has not been so obvious although there are few who have studied the common brand of physical optics who have not felt a passing dissatisfaction with the ad hoc character of the treatment of many parts of it in terms of monochromatic plane waves. Symptomatic of this dissatisfaction has been the work of Gouy, Schuster, Stokes, Rayleigh, Mueller, and Wiener directed toward a proper description of the “white” and “partially polarized” aspects of radiation. Even in the microwave region the necessity for statistics makes itself felt when one is faced with the problem of scattering from sea waves, the leaves of trees, and other assemblages of scatterers. Find any difficulties with Algebra 1 and Algebra 2 ? get Algebra 1 Help and Algebra 1 Answers also Algebra 2 Help and Algebra 2 Answers
