External to the body, alpha is not dangerous because it is easily stopped by the skin, but it becomes dangerous if ingested because it can then access internal sensitive organs directly.
For electromagnetic radiation, visible light and infra-red are the least damaging. Ultra-violet causes sunburn)
Ultra Violet.
Humans emit visible light in the form of infrared radiation, which is a type of electromagnetic radiation.
The ozone layer protects us from the radiation of sun. This radiation is called ultraviolet radiation and is very harmful.
it is one kind of rays whic is very harmful and effetive for the livingthings
Humans emit infrared light, which is a type of electromagnetic radiation that is not visible to the human eye.
Evil animals, like evil spiders and rats
All high frequency radiation e.g. X rays , gamma rays etc. are harmful to living things .
A definition for poison is something that can be harmful, unpleasant, and fatal. Radiation can be harmful therefor radiation could be a poison.There is something called acute radiation syndrome which is also called radiation poisoning. This occurs when there is destruction of living tissue due to the effects of being exposed to high levels of radiation.
CFCs (chlorofluorocarbons) destroy the ozone layer allowing harmful radiation to reach the earth.
There are a number of types of radiation that can cause mutation in humans.Gamma radiation is probably the one you were thinking of, but ultraviolet radiation can also cause mutation.Pretty much any kind of radiation that causes mutation will almost always cause cancer, as a result.
The oxygen in Earth's atmosphere is not able to absorb ultraviolet radiation. It is the ozone layer, made up of O3 molecules, that absorbs most of the Sun's harmful UV radiation before it reaches the surface of the Earth.
No Alpha radiation is essentially a helium nucleus - a couple of protons and neutrons bound together as a particle Beta radiation is an electron or positron - still a particle but not the same kind of particle as alpha.