The aperture is the opening formed by the blades of the iris or diaphragm in the lens, through which light passes to expose the film. Aperture size is usually given in f-numbers, ...
Sections of the Roman Catholic Mass that vary from day to day throughout the church year according to the particular liturgical occasion; as distinct from the Ordinary, in which ...
is the color formed by mixing red and green light. Yellow is complimentary to blue, and is one of the three colors used in subtractive color synthesis.
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