Society of Glass Technology · [Sheffield] · leaf 350
when the angle of incidence, ?, is such that its tangentequals the refractive index of the glass used for the pile. Afterreflection, the light leaves the glass plate at an angle, /, equal tothe angle of incidence, and is now a beam of so-called plane])olarised light. If, now, this plane polarised… … Fig. L condition is reached, the polariscope is correctly set for the ex-amination of glass for strain. If, now, we place a piece of glassware, say a flask, with its long axis, _/7, at 45° to the edges of thepolarising plates, in the path of the beam, C, and examine itthrough the analyser, one of…
Glass
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
