The 289 area code was created as an area code overlay for the Mississauga (Streetsville) area. Unlike the previous solutions, this process did not require the place to be geographically separated by different area codes.
Ionizing radiation is a term used for radiation whose quanta have energy to directly or indirectly ionize (one or more electrons are released from the atom of the given substance) molecules or atoms while passing through matter, hence the name ionizing radiation.
It is the effect of this radiation that makes us visually aware of the sun and, at the same time, makes it extremely dangerous to look at the sun directly, since the electromagnetic energy delivered to the retinal cells in your eye can be extremely damaging.