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.
Intensity, on the other hand deals with the amount of purity in the hue itself. It can also be referred to as âsaturationâ. Primary colors are considered to be the most âpureâ in intensity. Intensity can also be considered as the brightness or dullness of a color. Intensity is adjusted by adding additional colors to the pure hue. A color can be made less intense by adding gray to the color. In some ways, intensity can be measured by the amount of gray in the hue. Hues can only degrade in intensity. In other words, additional colors cannot be added to a hue to make them âmore intenseâ. Each color that is added to a pure hue decreases its intensity.