Focus vs Null - What's the difference?
focus | null |
(countable, optics) A point at which reflected or refracted rays of light converge.
(countable, geometry) A point of a conic at which rays reflected from a curve or surface converge.
(uncountable, photography, cinematography) The fact of the convergence of light on the photographic medium.
* {{quote-magazine, year=2013, month=July-August, author=
, magazine=(American Scientist), title= (uncountable, photography, cinematography) The quality of the convergence of light on the photographic medium.
(uncountable) Concentration of attention.
(countable, seismology) The exact point of where an earthquake occurs, in three dimensions.
(computing, graphical user interface) The indicator of the currently active element in a user interface.
(linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.
To cause (rays of light, etc) to converge at a single point.
To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.
To concentrate one's attention.
To concentrate one’s attention.
A non-existent or empty value or set of values.
Zero]] quantity of [[expression, expressions; nothing.
Something that has no force or meaning.
(computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
(computing) the attribute of an entity that has no valid value.
One of the beads in nulled work.
(statistics) null hypothesis
Having no validity, "null and void"
insignificant
* 1924 , Marcel Proust, Within a Budding Grove :
absent or non-existent
(mathematics) of the null set
(mathematics) of or comprising a value of precisely zero
(genetics, of a mutation) causing a complete loss of gene function, amorphic.
As nouns the difference between focus and null
is that focus is (countable|optics) a point at which reflected or refracted rays of light converge while null is zero, nil; the cardinal number before einn.As a verb focus
is to cause (rays of light, etc) to converge at a single point.focus
English
(wikipedia focus)Noun
Catherine Clabby
Focus on Everything, passage=Not long ago, it was difficult to produce photographs of tiny creatures with every part in focus'.
Verb
- You'll need to focus the microscope carefully in order to capture the full detail of this surface.
- Focus on passing the test.
- If you're going to beat your competitors, you need to focus .
Usage notes
The spellings focusses'', ''focussing'', ''focussed'' are more common in Commonwealth English than in American English, but in both varieties they are less common than the spellings ''focuses'', ''focusing'', ''focused .Derived terms
* focus group * in focus * out of focusnull
English
Noun
(en noun)- (Francis Bacon)
- Since no date of birth was entered for the patient, his age is null .
Adjective
(en adjective)- In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.