This document summarizes different types of ionizing radiation: particulate radiation like alpha and beta particles, and non-particulate electromagnetic radiation like gamma rays and x-rays. It describes their penetrating abilities and biological effects. Exposure is measured in sieverts and controlled through shielding, distance, and reduced exposure time. Proper protection equipment and regulated areas are required to minimize radiation risks like cancer and genetic defects. Monitoring and health surveillance help ensure safety standards are met.