Wednesday, 28 June 2017



1. a point of convergence of light or other electromagnetic radiation, particles, sound waves, etc., or a point from which they appear to diverge
2. another name for focal point, focal length
3. (optics) . the state of an optical image when it is distinct and clearly defined or the state of an instrument producing this image
4. a point upon which attention, activity, etc., is directed or concentrated
5.( geometry) . a fixed reference point on the concave side of a conic section, used when defining its eccentricity
6. the point beneath the earth's surface at which an earthquake or underground nuclear explosion originates
7. (pathology) . the main site of an infection or a localized region of diseased tissue
8. to bring or come to a focus or into focus
9. (trans. ; often followed by “on”) . to fix attention (on); concentrate

A point of convergence
Defining our eccentricity
By its colour and shape
A distinct focus
Slightly blurred by grain

Particles movement

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