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  2. PRISM - Wikipedia

    en.wikipedia.org/wiki/PRISM

    On June 18, NSA Director Alexander said in an open hearing before the House Intelligence Committee of Congress that communications surveillance had helped prevent more than 50 potential terrorist attacks worldwide (at least 10 of them involving terrorism suspects or targets in the United States) between 2001 and 2013, and that the PRISM web ...

  3. Polarizer - Wikipedia

    en.wikipedia.org/wiki/Polarizer

    The Sénarmont prism is air spaced, unlike the Wollaston and Rochon prisms. These prisms truly split the beam into two fully polarized beams with perpendicular polarizations. The Nomarski prism is a variant of the Wollaston prism, which is widely used in differential interference contrast microscopy .

  4. Before and After (film) - Wikipedia

    en.wikipedia.org/wiki/Before_and_After_(film)

    Before and After is a 1996 American crime drama film based on Rosellen Brown's 1992 novel of the same name about two parents who must deal with the after effects when their son is accused of murder. The movie was directed by Barbet Schroeder and starred Meryl Streep as Dr. Carolyn Ryan, Liam Neeson as Ben Ryan, Edward Furlong as Jacob Ryan, and ...

  5. Prismatic World Tour - Wikipedia

    en.wikipedia.org/wiki/Prismatic_World_Tour

    Soon after, she exits the stage once more after thanking everyone for attending and introducing her band members. For the encore, an interlude called "Prism-Vision" is played, where the audience is encouraged to wear special rainbow-star diffraction glasses picked up before the show to magnify the visual effects of the performance.

  6. Opticks - Wikipedia

    en.wikipedia.org/wiki/Opticks

    Newton's contribution to prismatic dispersion was the first to outline multiple-prism arrays. Multiple-prism configurations, as beam expanders, became central to the design of the tunable laser more than 275 years later and set the stage for the development of the multiple-prism dispersion theory. [3] [4]

  7. Maddox rod - Wikipedia

    en.wikipedia.org/wiki/Maddox_rod

    The strength of the prism is increased until the streak of the light passes through the centre of the prism, as the strength of the prism indicates the amount of deviation present. The Maddox rod is a handheld instrument composed of red parallel plano convex cylinder lens , which refracts light rays so that a point source of light is seen as a ...

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