Focus vs. Concentration

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Focusnoun

A point at which reflected or refracted rays of light converge.

Focusnoun

A point of a conic at which rays reflected from a curve or surface converge.

Focusnoun

The fact of the convergence of light on the photographic medium.

Focusnoun

The quality of the convergence of light on the photographic medium.

Focusnoun

(uncountable) Concentration of attention.

Focusnoun

The exact point of where an earthquake occurs, in three dimensions (underneath the epicentre).

Focusnoun

The indicator of the currently active element in a user interface.

Focusnoun

(linguistics) The most important word or phrase in a sentence or passage, or the one that imparts information.

Focusverb

(transitive) To cause (rays of light, etc) to converge at a single point.

Focusverb

(transitive) To adjust (a lens, an optical instrument) in order to position an image with respect to the focal plane.

Focusverb

To concentrate one's attention.

Focusverb

(intransitive) To concentrate one’s attention.

Focusverb

To transfer the input focus to (a visual element), so that it receives subsequent input.

Focusnoun

A point in which the rays of light meet, after being reflected or refracted, and at which the image is formed; as, the focus of a lens or mirror.

Focusnoun

A point so related to a conic section and certain straight line called the directrix that the ratio of the distance between any point of the curve and the focus to the distance of the same point from the directrix is constant.

Focusnoun

A central point; a point of concentration.

Focusverb

To bring to a focus; to focalize; as, to focus a camera.

Focusnoun

the concentration of attention or energy on something;

Focusnoun

maximum clarity or distinctness of an image rendered by an optical system;

Focusnoun

maximum clarity or distinctness of an idea;

Focusnoun

a central point or locus of an infection in an organism;

Focusnoun

special emphasis attached to something;

Focusnoun

a point of convergence of light (or other radiation) or a point from which it diverges

Focusnoun

a fixed reference point on the concave side of a conic section

Focusverb

direct one's attention on something;

Focusverb

cause to converge on or toward a central point;

Focusverb

bring into focus or alignment; to converge or cause to converge; of ideas or emotions

Focusverb

become focussed or come into focus;

Focusverb

put (an image) into focus;

Focusnoun

the centre of interest or activity

Focusnoun

an act of concentrating interest or activity on something

Focusnoun

the point of origin of an earthquake.

Focusnoun

the principal site of an infection or other disease.

Focusnoun

the state or quality of having or producing clear visual definition

Focusnoun

another term for focal point

Focusnoun

the point at which an object must be situated with respect to a lens or mirror for an image of it to be well defined.

Focusnoun

a device on a lens which can be adjusted to produce a clear image.

Focusnoun

one of the fixed points from which the distances to any point of a given curve, such as an ellipse or parabola, are connected by a linear relation.

Focusnoun

an element of a sentence that is given prominence by intonational or other means.

Focusverb

adapt to the prevailing level of light and become able to see clearly

Focusverb

cause (one's eyes) to focus

Focusverb

adjust the focus of (a telescope, camera, or other instrument)

Focusverb

(of rays or waves) meet at a single point.

Focusverb

(of a lens) make (rays or waves) meet at a single point.

Focusverb

(of light, radio waves, or other energy) become concentrated into a sharp beam.

Focusverb

(of a lens) concentrate (light, radio waves, or energy) into a sharp beam.

Focusverb

pay particular attention to

Focusverb

concentrate

Focusverb

place the focus on (an element of a sentence).

Concentrationnoun

The act, process or ability of concentrating; the process of becoming concentrated, or the state of being concentrated.

Concentrationnoun

The direction of attention to a specific object.

Concentrationnoun

The act, process or product of reducing the volume of a liquid, as by evaporation.

Concentrationnoun

The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.

Concentrationnoun

A field or course of study on which one focuses, especially as a student in a college or university.

Concentrationnoun

The proportion of a substance in a whole.

Concentrationnoun

(chemistry) The amount of solute in a solution measured in suitable units (e.g., parts per million (ppm))

Concentrationnoun

The matching game pelmanism.

Concentrationnoun

The act or process of concentrating; the process of becoming concentrated, or the state of being concentrated; concentration.

Concentrationnoun

The act or process of reducing the volume of a liquid, as by evaporation.

Concentrationnoun

The act or process of removing the dress of ore and of reducing the valuable part to smaller compass, as by currents of air or water.

Concentrationnoun

the strength of a solution; number of molecules of a substance in a given volume (expressed as moles/cubic meter)

Concentrationnoun

the spatial property of being crowded together

Concentrationnoun

strengthening the concentration (as of a solute in a mixture) by removing extraneous material

Concentrationnoun

increase in density

Concentrationnoun

complete attention; intense mental effort

Concentrationnoun

bringing together military forces

Concentrationnoun

great and constant diligence and attention

Concentrationnoun

the action or power of focusing all one's attention

Concentrationnoun

dealing with one particular thing above all others

Concentrationnoun

a close gathering of people or things

Concentrationnoun

the action of gathering together closely

Concentrationnoun

the relative amount of a particular substance contained within a solution or mixture or in a particular volume of space

Concentrationnoun

the action of strengthening a solution by the removal or reduction of the diluting agent or by the selective accumulation of atoms or molecules

Concentration

In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration.

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