It isn't. Arsenic is a poisonous substance; most people won't use it, unless they work in very specialized areas.
Chat with our AI personalities
Mostly it is not used every day.
Prime example of radiation in our every day life is the heat we get from the sun (mostly radiation heat)
the shape of cuboid can be used in designing buildings
Anywhere, at any time. Architects, chemist, engineers...
It is similar to your body or a cup you drink every day