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Photograph of a triangular prism, dispersing light Lamps as seen through a prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow). Different wavelengths (colors) of light will be deflected by the prism at different angles. [1]
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The earliest reference to a specific magnetic "direction finder" device for land navigation is recorded in a Song dynasty book dated to 1040–44. There is a description of an iron "south-pointing fish" floating in a bowl of water, aligning itself to the south. The device is recommended as a means of orientation "in the obscurity of the night."
LCD in a Texas Instruments calculator with top polarizer removed from device and placed on top, such that the top and bottom polarizers are perpendicular. As a result, the colors are inverted. The optical effect of a TN device in the voltage-on state is far less dependent on variations in the device thickness than that in the voltage-off state.
8×42 roof prism binoculars with rainguard and opened tethered lens caps. Binoculars or field glasses are two refracting telescopes mounted side-by-side and aligned to point in the same direction, allowing the viewer to use both eyes (binocular vision) when viewing distant objects.
Mary Violet Leontyne Price (/ l i ˈ ɒ n t iː n, ˈ l iː ə n t iː n / lee-ON-teen, LEE-ən-teen; born February 10, 1927) is an American spinto soprano who was the first African-American soprano to receive international acclaim. [1] From 1961 she began a long association with the Metropolitan Opera.
The Prentice position. The Prentice position is an orientation of a prism, used in optics, optometry and ophthalmology. [1] In this position, named after the optician Charles F. Prentice, the prism is oriented such that light enters it at an angle of 90° to the first surface, so that the beam does not refract at that surface.
Florence Beatrice Price (née Smith; April 9, 1887 – June 3, 1953) was an American classical composer, pianist, organist and music teacher. [2] Born in Little Rock, Arkansas, Price was educated at the New England Conservatory of Music, and was active in Chicago from 1927 until her death in 1953.