Focal Point Sign Video
Upload On Thu Aug 23 2012 by ASL STEM
Average Rating: 4.00 / 5
Definition
1. Also called: principal focus, focus. the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection. 2. a central point of attention or interest.
Source: Collins English Dictionary. London: Collins, 2000. Credo Reference. Web. 17 August 2012.
Other Submissions
No other submissions.
BROWSE
All
> Mathematics
> Geometry
> Focal Point
* video needed
click here to zoom in