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.
Solar maculopathy. 1  Description-solar radiation can cause photochemical effects in the retina as a result of looking directly or indirectly at the sun. 2  Presentation - 1-4 hours after exposure the patient complains of impairment of central vision, with or without metamorphopsia and with or without a central scotoma.