8 to the Bar 8 to the Bar 8 to the Bar is a studio album released by Pete Johnson and Albert Ammons in 1941 on Victor 78rpm set P-69, record numbers 27504 through 27507. It was recorded in two sessions, May 7 and June 17, 1941. It was reissued by RCA Victor in 1952 as a 10-inch LP record as LPT-9. In the United Kingdom, this LP was released by the Gramophone Company as HMV DLP 1011. It was also released as a set of four 45rpm discs, WPT-14. The album peaked at number 2, in 1945, on Billboard's album chart. All titles
Angular diameter Angular diameter The angular diameter, angular size, apparent diameter, or apparent size is an angular measurement describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in optics, it is the angular aperture (of a lens). The angular diameter can alternatively be thought of as the angle through which an eye or camera must rotate to look from one side of an apparent circle to the opposite side. Angular radius equals half the angular diameter. The angular diameter of a circle whose plane is perpendicular