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Что (кто) такое focal distance - определение
MEASURE OF HOW STRONGLY AN OPTICAL SYSTEM CONVERGES OR DIVERGES LIGHT
Focal distance; Effective focal length; Front focal length; Back focal length; Rear focal length; Front focal distance; Rear focal distance; Back focal distance; Focal Length; Focus length; Focal Legnth; Focal length (photography); Lens focal length
Найдено результатов: 790
Focal length
The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light.
focal length
¦ noun the distance between the centre of a lens or curved mirror and its focus.
?the equivalent distance in a compound lens or telescope.
Focal neurologic signs
IMPAIRMENT OF NERVE, SPINAL CORD, OR BRAIN FUNCTION THAT AFFECTS A SPECIFIC REGION OF THE BODY
Focal neurologic symptom; Focal neurological signs; Focal neurological deficit; Focal neurology; Focal neurologic deficit; Neurological sign; Neurological soft signs; Focal neurologic deficits; Focal (neurology)
Focal neurologic signs also known as focal neurological deficits or focal CNS signs are impairments of nerve, spinal cord, or brain function that affects a specific region of the body, e.g.
Distance
![Airline routes between [[Los Angeles]] and [[Tokyo]] approximately follow a direct [[great circle]] route (top), but use the [[jet stream]] (bottom) when heading eastwards. The shortest route appears as a curve rather than a straight line because the [[map projection]] does not scale all distances equally compared to the real spherical surface of the Earth.](https://commons.wikimedia.org/wiki/Special:FilePath/Greatcircle Jetstream routes.svg?width=200 "Airline routes between [[Los Angeles]] and [[Tokyo]] approximately follow a direct [[great circle]] route (top), but use the [[jet stream]] (bottom) when heading eastwards. The shortest route appears as a curve rather than a straight line because the [[map projection]] does not scale all distances equally compared to the real spherical surface of the Earth.")
![[[Manhattan distance]] on a grid](https://commons.wikimedia.org/wiki/Special:FilePath/Manhattan distance.svg?width=200 "[[Manhattan distance]] on a grid")
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
·noun Remoteness of place; a remote place.
II. Distance ·vt To place at a distance or remotely.
III. Distance ·noun Space between two antagonists in fencing.
IV. Distance ·noun Ideal disjunction; discrepancy; contrariety.
V. Distance ·noun A space marked out in the last part of a race course.
VI. Distance ·vt To cause to appear as if at a distance; to make seem remote.
VII. Distance ·noun The interval between two notes; as, the distance of a fourth or seventh.
VIII. Distance ·noun Length or interval of time; period, past or future, between two eras or events.
IX. Distance ·noun The remoteness or reserve which respect requires; hence, respect; ceremoniousness.
X. Distance ·noun A withholding of intimacy; alienation; coldness; disagreement; variance; restraint; reserve.
XI. Distance ·noun Remoteness in succession or relation; as, the distance between a descendant and his ancestor.
XII. Distance ·vt To outstrip by as much as a distance (see Distance, ·noun, 3); to leave far behind; to surpass greatly.
XIII. Distance ·noun The part of a picture which contains the representation of those objects which are the farthest away, ·esp. in a landscape.
XIV. Distance ·noun Relative space, between troops in ranks, measured from front to rear;
- contrasted with interval, which is measured from right to left.
XV. Distance ·noun The space between two objects; the length of a line, especially the shortest line joining two points or things that are separate; measure of separation in place.
distance
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
¦ noun
1. the length of the space between two points: I cycled the short distance home.
2. the condition of being remote.
a far-off point.
3. the full length of a race or other contest.
Brit. Horse Racing a space of more than twenty lengths between two finishers in a race.
(the distance) Brit. Horse Racing a length of 240 yards from the winning post on a racecourse.
4. an interval of time.
5. aloofness or reserve.
¦ verb make distant.
?(often distance oneself from) dissociate or separate.
Phrases
go the distance last or continue to participate until the scheduled end of a contest.
keep one's distance stay far away.
?maintain one's reserve.
Origin
ME (in the sense 'discord, debate'): from OFr. or from L. distantia, from distant-, distare (see distant).
Distance
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
Distance is a numerical or occasionally qualitative measurement of how far apart objects or points are. In physics or everyday usage, distance may refer to a physical length or an estimation based on other criteria (e.
distance
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
(distances, distancing, distanced)
Frequency: The word is one of the 1500 most common words in English.
1.
The distance between two points or places is the amount of space between them.
...the distance between the island and the nearby shore...
Everything is within walking distance...
N-VAR: with supp, oft N between pl-n
2.
When two things are very far apart, you talk about the distance between them.
The distance wouldn't be a problem.
N-UNCOUNT
3.
Distance learning or distance education involves studying at home and sending your work to a college or university, rather than attending the college or university in person.
I'm doing a theology degree by distance learning.
ADJ: ADJ n
4.
When you want to emphasize that two people or things do not have a close relationship or are not the same, you can refer to the distance between them.
There was a vast distance between psychological clues and concrete proof...
N-UNCOUNT: usu N between pl-n [emphasis]
5.
If you can see something in the distance, you can see it, far away from you.
We suddenly saw her in the distance...
N-SING: in/into the N
6.
Distance is coolness or unfriendliness in the way that someone behaves towards you. (FORMAL)
There were periods of sulking, of pronounced distance, of coldness.
? closeness
N-UNCOUNT: usu with supp
7.
If you distance yourself from a person or thing, or if something distances you from them, you feel less friendly or positive towards them, or become less involved with them.
The author distanced himself from some of the comments in his book...
Television may actually be distancing the public from the war.
VERB: V pron-refl from n, V n from n
• distanced
Clough felt he'd become too distanced from his fans.
ADJ: v-link ADJ, usu ADJ from n
8.
If you are at a distance from something, or if you see it or remember it from a distance, you are a long way away from it in space or time.
The only way I can cope with my mother is at a distance...
Now I can look back on the whole tragedy from a distance of forty years.
PHRASE: PHR after v, v-link PHR
9.
If you keep your distance from someone or something or keep them at a distance, you do not become involved with them.
Jay had always tended to keep his girlfriends at a distance.
PHRASE: V inflects
10.
If you keep your distance from someone or something, you do not get physically close to them. (OLD-FASHIONED)
He walked towards the doorway, careful to keep his distance.
PHRASE: V inflects
distance
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
I. n.
1.
Remoteness.
2.
Degree of remoteness or removal.
3.
Remote region, distant quarter.
4.
Interval, space, space intervening.
5.
Reserve, coldness, stiffness, distant behavior, frigidity.
II. v. a.
Outdo, surpass, excel, outstrip, leave behind.
Focal segmental glomerulosclerosis
![Bowman's space]]. Large molecules, such as proteins, are usually too large to be filtered and instead are retained in the capillaries.](https://commons.wikimedia.org/wiki/Special:FilePath/Bowman's capsule and glomerulus.svg?width=200 "Bowman's space]]. Large molecules, such as proteins, are usually too large to be filtered and instead are retained in the capillaries.")
KIDNEY DISEASE
FSGS; Glomerulosclerosis, focal; Focal and segmental glomerular lesions; Focal segmental glomerular sclerosis; Focal Segmental Glomerulosclerosis; Collapsing glomerulopathy
Focal segmental glomerulosclerosis (FSGS) is a histopathologic finding of scarring (sclerosis) of glomeruli and damage to renal podocytes.Rosenberg, Avi Z.
distance
LENGTH OF STRAIGHT LINE THAT CONNECTS TWO POINTS IN A MEASURABLE SPACE OR IN AN OBSERVABLE PHYSICAL SPACE
Distances; Distance Formula; Distance in time; Time distance; Directed distance; Distance traveled; Oriented distance; Distance (mathematics); Distance between sets
I
n.
1) to cover; run; travel; walk a distance
2) to keep a distance (to keep a safe distance between cars)
3) to close the distance between
4) a discreet; good, great, long; safe; short distance (we traveled a short distance)
5) (a) shouting; striking; walking distance (it's within easy walking distance)
6) (a) braking, stopping distance
7) a distance between; from; to (the distance between New York and London is three thousand miles; the distance from Philadelphia to Chicago is less than eight hundred miles)
8) at a distance (at a discreet distance; we spotted them at a distance of two hundred yards)
9) from a distance (I spotted her from a distance)
10) in the distance (the city was visible in the distance) (misc.)
11) to keep one's distance ('to not allow familiarity'); a short distance away; quite a distance
II
v. (D; refl.) to distance from
Википедия
Focal length
The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light. A system with a shorter focal length bends the rays more sharply, bringing them to a focus in a shorter distance or diverging them more quickly. For the special case of a thin lens in air, a positive focal length is the distance over which initially collimated (parallel) rays are brought to a focus, or alternatively a negative focal length indicates how far in front of the lens a point source must be located to form a collimated beam. For more general optical systems, the focal length has no intuitive meaning; it is simply the inverse of the system's optical power.
In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with lower magnification and a wider angle of view. On the other hand, in applications such as microscopy in which magnification is achieved by bringing the object close to the lens, a shorter focal length (higher optical power) leads to higher magnification because the subject can be brought closer to the center of projection.
