aperture definition

  • noun:
    • An opening, like a hole, gap, or slit.
    • A usually adjustable opening in an optical tool, such a camera or telescope, that limits the amount of light passing through a lens or onto a mirror.
    • The diameter of such an opening, usually expressed as an f-number.
    • The diameter associated with the objective of a telescope.
    • An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; because, an aperture in a wall.
    • something limits the diameter of light course through one airplane in an optical system.
    • The diameter of aperture (inside sense above) which limits the width regarding the light course through the entire system. For a telescope, this is actually the diameter regarding the objective lens. e.g. a telescope might have a 100 cm aperture.
    • The (typically) large-diameter antenna used for getting and transmitting radio-frequency energy containing the info used in interaction satellites, particularly in the geostationary gear. For a comsat, this is certainly typically a sizable reflective meal antenna; occasionally known as an array.
    • the most perspective amongst the two generatrices.
    • The work of orifice.
    • An opening; an open room; a gap, cleft, or chasm; a passage perforated; a hole.
    • The diameter of uncovered an element of the object-glass of a telescope or any other optical instrument.
    • The act of opening out or unfolding.
    • An opening; a hole, orifice, gap, cleft, or chasm; a passage or perforation; any direct technique ingress or egress.
    • In geometry, the room between two intersecting correct lines.
    • In optics, the diameter of this uncovered an element of the object-glass in a telescope or other optical instrument.
    • a tool that manages number of light admitted
    • an man-made opening; frequently tiny
    • a natural orifice in something

Related Sources

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  • Astronomy Dictionary for "aperture"
    • how big is the orifice through…
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