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  2. Prism (optics) - Wikipedia

    en.wikipedia.org/wiki/Prism_(optics)

    Prism spectacles with a single prism perform a relative displacement of the two eyes, thereby correcting eso-, exo, hyper- or hypotropia. In contrast, spectacles with prisms of equal power for both eyes, called yoked prisms (also: conjugate prisms, ambient lenses or performance glasses) shift the visual field of both eyes to the same extent.

  3. Pavement light - Wikipedia

    en.wikipedia.org/wiki/Pavement_light

    Pavement light. Sidewalk prisms from above, with lights shining up from inside the hollow sidewalk. The purple shade has developed over a century. These are multi prisms; the ridges can be seen running vertically ( see § Transparent elements ). Pavement lights (UK), vault lights (US), floor lights, or sidewalk prisms are flat-topped walk-on ...

  4. Precision Strike Missile - Wikipedia

    en.wikipedia.org/wiki/Precision_Strike_Missile

    Maximum firing range. in excess of 310 mi (500 km) Launch. platform. M270 MLRS, M142 HIMARS. The Precision Strike Missile ( PrSM) is a short-range ballistic missile developed by the United States Army to replace the MGM-140 ATACMS . On December 8, 2023, the US Army announced that the first PrSM batch has been delivered.

  5. Fresnel lens - Wikipedia

    en.wikipedia.org/wiki/Fresnel_lens

    In late 1825, to reduce the loss of light in the reflecting elements, Fresnel proposed to replace each mirror with a catadioptric prism, through which the light would travel by refraction through the first surface, then total internal reflection off the second surface, then refraction through the third surface.

  6. The Dark Side of the Moon - Wikipedia

    en.wikipedia.org/wiki/The_Dark_Side_of_the_Moon

    This stained glass interpretation of the prism motif was used for the 2003 reissue. A quadraphonic mix, created by Alan Parsons, was commissioned by EMI but never endorsed by Pink Floyd, as Parsons was disappointed with his mix. For the album's 30th anniversary, an updated surround version was released in 2003.

  7. Porro prism - Wikipedia

    en.wikipedia.org/wiki/Porro_prism

    Total internal reflection in Porro prism. A single Porro prism. In optics, a Porro prism, named for its inventor Ignazio Porro, is a type of reflection prism used in optical instruments to alter the orientation of an image .