Alpha rays are a stream of charged particles, which are easily ionized wherever they go. Alpha rays have strong ionization energy and can be used. It also brings some harm, and it has great destructive ability to the tissues in the human body. Because of its large mass and poor penetration ability, its range in the air is only a few centimeters, which can be blocked by a piece of paper or healthy skin.
Extended data
Ionizing radiation is rarely exposed to people in daily life, but ultraviolet rays, infrared rays, microwaves and radio waves (from mobile phone base stations, high-voltage lines, computers, microwave ovens, etc. People are often exposed to electromagnetic waves in their lives, which will produce non-ionizing radiation.
Electromagnetic radiation has been listed by WHO as the fourth largest environmental pollution source after water, atmosphere and noise, and has become an invisible "killer" endangering human health. The harm of electromagnetic radiation to human body is mainly thermal effect and non-thermal effect. Long-term and excessive electromagnetic radiation will do harm to human reproductive, nervous and immune systems and induce various diseases.