What Is a Focus?

Answer

Focus is a devise on a lens that is adjusted so as to produce a clear image. It is also an act of concentrating interest on something or someone. Focus is the centre of interest.
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Ask.com Answer for: what is a focus
fo·cus
[foh-kuhs]
NOUN [PLURAL FO·CUS·ES, FO·CI]
1.
a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts.
2.
Physics. a point at which rays of light, heat, or other radiation, meet after being refracted or reflected.
3.
Geometry (of a conic section) a point having the property that the distances from any point on a curve to it and to a fixed line have a constant ratio for all points on the curve.
4.
Geology the point of origin of an earthquake.
5.
Pathology the primary center from which a disease develops or in which it localizes.
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Source: Dictionary.com
A focus is a point at which rays converge or from which they diverge. It could also be a localized area of a disease or the main site of a generalized infection or disease. The place of origin of an earthquake is also called a focus.
Q&A Related to "What Is a Focus"
A focus is a central point that someone devotes all of their energy and concentration on. A focus can be in a picture, in a movie, or even in real life.
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