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Definition

Aperture

Aperture is the magnitude of the angle subtended by the optical axis and the outermost rays still covered by the objective.

Webster Dictionary Meaning

1. Aperture
- The act of opening.
- An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.
- The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
Category: Microbiology
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