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  2. List of refractive indices - Wikipedia

    en.wikipedia.org/wiki/List_of_refractive_indices

    Download as PDF; Printable version; In other projects Wikidata item; ... [5] Carbon disulfide: 589.29: 1.628 [1] ... 4.05–4.1 [35] See also

  3. World population - Wikipedia

    en.wikipedia.org/wiki/World_population

    Estimates of world population by their nature are an aspect of modernity, possible only since the Age of Discovery.Early estimates for the population of the world [10] date to the 17th century: William Petty, in 1682, estimated the world population at 320 million (current estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent ...