What is cosmic radiation?
Cosmic radiation is composed of streams of particles coming partly from the sun and partly from outer space. This radiation interacts with the upper atmosphere to produce the cosmic radiation we experience at the earth’s surface People who live at high altitude have a higher dose from cosmic radiation than those who live at sea level because shielding by the atmosphere is less. Aircrews and frequent flyers spend time at very high altitudes where the dose is even higher.
