Dichroism

Phenomenon of light absorption, observed in certain transparent media in which the emergent light changes color with an increase of the thickne of the absorbing medium. If, e.g., the incident beam be made up of two colors of intensity, i, and i,, of which the coefficients of transmi ion are a, and a, respectively, the intensity of the emergent light for a thickne & will be in each case i, a, and i,a,s. Suppose now that ini, and a1 IMG:content-1153.png:[blocks in formation]