To give blood you must: 1  Be in general good health.  Be at least 17 years old. (If you are 16 you can donate with a CBC consent form signed by your parent). There is no upper age limit as long as you have no health restrictions.
Specific radiative intensity. Specific (radiative) intensity is a quantity used in physics that describes electromagnetic radiation. It is a term used in much of the older scientific literature. The present-day SI term is spectral radiance, which can be expressed in base SI units as W mâ2 srâ1 Hzâ1.
In physics, intensity is a measure of the time-averaged energy flux.   The word intensity here is not synonymous with strength, amplitude, or level, as it som â¦ etimes is in colloquial speech.   For example, the intensity of pressure is meaningless, since the parameters of those variables do not match. 2 people found this useful.