Branch of biology specializing in the study of the effects of radiation on biological molecules, cells, tissues, and whole organisms, including humans. Radiobiology seeks to discover the molecular changes responsible for radiation effects such as cancer induction, genetic changes, and cell death.
Radiation biology is the interdisciplinary field of science that studies the biological effects of ionizing and non-ionizing radiation of the whole electromagnetic spectrum, including radioactivity (alpha, beta and gamma), x-rays, ultraviolet radiation, visible light, microwaves, radio wave, low-frequency radiation (such as used in alternate electric transmission, ultrasound thermal radiation (heat), and related modalities.