The Disease: The Disease: Bacillus cereus can cause two distinct types of illnesses: 1) a diarrheal illness with an incubation time of approximately 10 to 16 hours, and 2) an emetic (vomiting) illness with an incubation time of one to six hours.
radius of curvature. n. (Mathematics) the absolute value of the reciprocal of the curvature of a curve at a given point; the radius of a circle the curvature of which is equal to that of the given curve at that point. See also centre of curvature.
R 1 {\displaystyle R_{1}} is the radius of curvature (with sign, see below) of the lens surface closest to the light source, R 2 {\displaystyle R_{2}} is the radius of curvature of the lens surface farthest from the light source, and.