sources like the Sun, the deep space and some materials like uranium, present Earth material.
also it comes from some materials, equipment and apparatuses invented by the man for diverse uses, like the x - rays equipment that as much
helped the medical practice.
that small amounts of radioactive substances are concretely in the atmosphere and in the air, the water, foods and until in our body, which in our organism is known like internal exhibition and while this does not exceed the permissible limits, it is not considered dangerous.
Nevertheless another one, the external exhibition exists, that comes from
sources outside the body and that is cumulative, is to say while more exhibition to her we have, greater will be the risk for the
. This type of
is the one that we received from the sun or radioactive substances elaborated by the man as they are: the electronic equipment like the furnaces of microwaves and the television sets, the equipment of x - rayses, x - ray and others used for the diagnosis and medical treatment and the plants of
and nuclear weapons, whose
released in the tests contaminates the atmosphere and puts in enormous risk the
on those who lives near the test places.
To the unit of measurement of the amount of
released in the atmosphere it is called curies to him. The
doses that receive the people are measured in called units rem or sievert. Sievert is equivalent to 100 rem. And scientists consider that in average
person receives near
third of rem per year, from which 80% come from
sources and 20% rest of artificial sources, mainly of used x - rayses actually medical.
IMPORTANT the content of this note is informative and it does not replace the medical diagnosis, reason why we do not become people in
on its use.