"Polariscope" Quotes from Famous Books
... observations that we possess on the nature and the light of comets are due to Arago's polarization experiments. His polariscope instructs us regarding the physical constitution of the Sun and comets, indicating whether a ray that reaches us from a distance of many millions of miles transmits light directly or by reflection; and if the former, whther the source of light is a ... — COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 • Alexander von Humboldt
... furnishes an excellent quality. It is highly prized by mineralogists on account of its double refractive qualities. If a piece of this mineral be placed over a word, the letters forming it will appear double. Iceland spar is used chiefly in the optical instrument known as the polariscope. ... — Wealth of the World's Waste Places and Oceania • Jewett Castello Gilson |