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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 ...
Typical pair of single vision glasses. Single vision lenses correct for only one distance. If they correct for far distance, the person must accommodate to see up close. If the person cannot accommodate, they may need a separate correction for near distances, or else use a multifocal lens (see below).
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 ...