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Harry Price (17 January 1881 – 29 March 1948) was a British psychic researcher and author, who gained public prominence for his investigations into psychical phenomena and exposing fraudulent spiritualist mediums.
The unwanted interference effects are suppressed by vapour-depositing a special dielectric coating known as a phase-compensating coating on the roof surfaces of the roof prism. These phase-correction coating or P-coating on the roof surfaces was developed in 1988 by Adolf Weyrauch at Carl Zeiss [6] Other manufacturers followed soon, and since ...
Pamela Y. Price (born 1957) is an American attorney serving as the District Attorney of Alameda County, California, since January 2023. A member of the Democratic Party , she is the first African-American woman to hold the office.
Mary Victoria Price (born April 27, 1962) is an American public speaker and the author of the memoir, The Way of Being Lost: A Road Trip to My Truest Self and Vincent Price: A Daughter's Biography. She currently spends much of her time traveling and speaking about the life of her father, Vincent Price , as well as discussing self-development ...
Vincent Leonard Price Jr. (May 27, 1911 – October 25, 1993) was an American actor. He was known for his work in the horror film genre, mostly portraying villains ...
A typical application of such a lens is to refocus the correction allowing clear vision at any distance. Unlike with bifocals, near-vision correction is achieved over the entire field of view, in any direction. Switching between distance and near vision is accomplished by re-adjusting the lens, instead of by tilting and/or rotating the head.
Porro prisms are most often used in pairs, forming a double Porro prism. A second prism rotated 90° with respect to the first, is placed such that light will traverse both prisms. The net effect of the prism system is a beam parallel to but displaced from its original direction, with the image rotated 180°.
The account also mentions that, in order to remove any potential water leaking through the hull, a device with a revolving screw-shaped blade inside a cylinder was designed by Archimedes. Archimedes' screw was turned by hand, and could also be used to transfer water from a low-lying body of water into irrigation canals. The screw is still in ...
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