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Whenever your exposed to radiation...
False. We are often exposed to low dose radiation.
Radiation exposure is being exposed to radiation (as x rays, gamma, beta, neutrons, alpha, ...etc) but contamination is breathing or ingesting something polluted with contaminants as mercury, carbon dioxide, uranium, plutonium, arsenic, ...etc
is a type of chemical when exposed to radiation emits visible light.
Radiation pneumonitis is in relation to being exposed to radiation, therefore the only way another person could get this inflammation of the lungs is by having their person exposed to radiation as well.
The radiation badges tell you how much radiation you have been exposed to so you know when you have been exposed to enough (before it becomes dangerous) and you can stop work in that area until you are able to be exposed to radiation again. They sometimes wear lead aprons to protect themselves from radiation. I think this is right but you had better check again somewhere else because it might not be right.
Radiation exposure is being exposed to radiation (as x rays, gamma, beta, neutrons, alpha, ...etc) but contamination is breathing or ingesting something polluted with contaminants as Mercury, carbon dioxide, uranium, plutonium, arsenic, ...etc
Which group in am controlled experiment is not exposed to the experimental variable
being exposed to radiation could cause cancer.
That depends on type of radiation, dosage, and area exposed.
Cosmic rays
The Thermosphere