Elements of natural philosophy (Volume 2-3) . n of an ellipse referred to its eiiipticaiiy The axes of the ellipses in this case preserving the samepoanz direction, the light will, from what we have already said, be eiiipticaiiy polarized, and is obviously compounded of two waves plane polarized in planes at right angles to each A -, C G, ct — 0 ss —, and — = Supposition iu Equation (107); 4. a J Equation (107), reduces to Which reduces it g>2 _i_ y2 __ q2 . (lOS^ to the equation of ^ a circle; the equation of a circle, and the light becomes circularly polarized, bei
Elements of natural philosophy (Volume 2-3) . n of an ellipse referred to its eiiipticaiiy The axes of the ellipses in this case preserving the samepoanz direction, the light will, from what we have already said, be eiiipticaiiy polarized, and is obviously compounded of two waves plane polarized in planes at right angles to each A -, C G, ct — 0 ss —, and — = Supposition iu Equation (107); 4. a J Equation (107), reduces to Which reduces it g>2 _i_ y2 __ q2 . (lOS^ to the equation of ^ a circle; the equation of a circle, and the light becomes circularly polarized, being compounded of two plane polarized waves Li-htcircularly of equal intensity, having their planes of polarization at polarized; right angles to each other. In this latter case, the light ELEMENTS OF OPTICS. 327 will possess many of the properties of common light, but common light roav be rccrardcd will differ from it in some important, particulars to be as compounded of two waves Fig. 92. polarized inplanes perpendicular toeach other;. noticed presently. §133. The differencebetween polarized andcommon light being,that in the former, theaxes of the ellipses de-scribed by the molecules remain parallel, while in thelatter they are incessantly changing their directions;common light, like elliptically polarized light, may beregarded as compounded of two plane polarized waves,of which the planes of polarization are at right anglesto each other. When these component vibrations areseparated, each component becomes plane polarized light, grating theseThis separation may be effected, either by causing these componentcomponent vibrations to take different directions by or-dinary reflexion and refraction, by the retardation or ac-celeration of one over the other, as in the case of double 7 Different ways of refraction, soon to be explained, or by absorbing one and causing thispermitting the other to pass unobstructed. Effect of separation. POLARIZATION BY REFLEXION AND REFRACTION.
Size: 3008px × 831px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectmechanics, booksubjectopticsandphoto
