Angular Size

Some articles on angular size, size, angular:

Moon Illusion - Possible Explanations - Angular Size and Physical Size
... The "size" of an object in our view can be measured either as angular size (the angle that it subtends at the eye, corresponding to the proportion of the field of vision that it occupies) or physical size (its ... of the nearer object, but we do not normally perceive that it is half the size ... the Moon illusion, therefore, is whether the horizon moon appears larger because its perceived angular size seems greater, or because its perceived physical size seems greater, or some combination of ...
Standard Ruler
... ruler is an astronomical object whose approximate size is known ... By measuring its apparent angular diameter in the sky, one can determine its distance from Earth ... An object with a known diameter would look smaller at farther distances, the angular size being proportional to the inverse of the distance to the object ...
Perceived Visual Angle - Perceived Measures - Difference Between θ′ and S′
... the window, meaning that the perceived linear size S′ for the house's width is much larger than S′ for the window for instance a person might say the house "looks about 40 feet wide" and the window ... It needs to specify whether "looks larger" refers to the perceived angular size (θ′) or to the perceived linear size (S′) or to both of those qualitatively different "size ... Notice that in everyday conversations "looks larger" often refers to an angular size comparison rather than a linear size comparison ...

Famous quotes containing the word size:

    Beauty depends on size as well as symmetry. No very small animal can be beautiful, for looking at it takes so small a portion of time that the impression of it will be confused. Nor can any very large one, for a whole view of it cannot be had at once, and so there will be no unity and completeness.
    Aristotle (384 B.C.–322 B.C.)