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 means the amount of radiation in an area. Exposure means the length of time that the radiation that is present. Low intensity radiation can cause small changes to the DNA which may alter the cell without killing it. A change in the DNA of a cell is called a mutation.Some mutations are harmless and make no difference to the organism, some may be beneficial (good), and some may be harmful.ntensity means the amount of radiation in an area. Exposure means the length of time that the radiation that is present. Low intensity radiation can cause small changes to the DNA which may alter the cell without killing it. A change in the DNA of a cell is called a mutation.