Phase Shifting Interferometry

Famous quotes containing the words phase and/or shifting:

    “The problem of the twentieth century is the problem of the color-line—the relation of the darker to the lighter races of men in Asia and Africa, in America and the islands of the sea. It was a phase of this problem that caused the Civil War.”
    —W.E.B. (William Edward Burghardt)

    “Learning is, in too many cases, but a foil to common sense; a substitute for true knowledge. Books are less often made use of as “spectacles” to look at nature with, than as blinds to keep out its strong light and shifting scenery from weak eyes and indolent dispositions.... The learned are mere literary drudges.”
    —William Hazlitt (1778–1830)