| 释义 |
Definition of subtense in English: subtensenoun səbˈtɛnssəbˈtens Geometry 1A subtending line, especially the chord of an arc. Example sentencesExamples - What is the visual subtense of the spot?
- The evanescent subtense of the angle of contact, in all curves which at the point of contact have a finite curvature, is ultimately in the duplicate ratio of the subtense of the conterminate arc.
- The controlled magnification optics as well as a compact design allow for a small subtense angle and increased efficiency.
- 1.1 The angle subtended by a line at a point.
Example sentencesExamples - Relative distance magnification is achieved when the distance to the object is decreased, thereby increasing the angular subtense of the object.
- The image has a larger angular subtense than the original object; therefore, the objects appear larger when seen through this optical system even though the virtual image is smaller than the object.
- The average angular subtenses of Ricco's areas for the ten youngest and ten oldest observers were approximately 48 and 69 arc min, respectively.
- The center of perspective is that viewpoint at which the angular subtenses of points in the picture are identical with the angular subtenses of the original points in the scene, at the camera lens.
- However, when the angular subtense of the missile flare is greater than the angular subtense of the target, the target will be totally obscured by the flare when the missile is on the sightline.
Origin Early 17th century: from modern Latin subtensa (linea), feminine past participle of subtendere (see subtend). Definition of subtense in US English: subtensenounsəbˈtens Geometry 1A subtending line, especially the chord of an arc. Example sentencesExamples - The evanescent subtense of the angle of contact, in all curves which at the point of contact have a finite curvature, is ultimately in the duplicate ratio of the subtense of the conterminate arc.
- What is the visual subtense of the spot?
- The controlled magnification optics as well as a compact design allow for a small subtense angle and increased efficiency.
- 1.1 The angle subtended by a line at a point.
Example sentencesExamples - The center of perspective is that viewpoint at which the angular subtenses of points in the picture are identical with the angular subtenses of the original points in the scene, at the camera lens.
- The image has a larger angular subtense than the original object; therefore, the objects appear larger when seen through this optical system even though the virtual image is smaller than the object.
- The average angular subtenses of Ricco's areas for the ten youngest and ten oldest observers were approximately 48 and 69 arc min, respectively.
- However, when the angular subtense of the missile flare is greater than the angular subtense of the target, the target will be totally obscured by the flare when the missile is on the sightline.
- Relative distance magnification is achieved when the distance to the object is decreased, thereby increasing the angular subtense of the object.
Origin Early 17th century: from modern Latin subtensa (linea), feminine past participle of subtendere (see subtend). |