säteilylähteillä

Säteilylähteillä refers to sources of radiation. Radiation is energy that travels through space in the form of waves or particles. These sources can be natural or artificial. Natural radiation sources are all around us, originating from cosmic rays from outer space, the Earth's crust (radionuclides in soil and rocks), and even from within our own bodies (e.g., potassium-40). Artificial radiation sources are man-made and include medical applications like X-rays and radiotherapy, nuclear power plants, and certain industrial processes. The type and intensity of radiation emitted vary significantly depending on the source. Understanding these sources is crucial for radiation protection and for harnessing radiation for beneficial purposes in medicine, industry, and research. Radiation can be categorized as ionizing or non-ionizing. Ionizing radiation, such as X-rays, gamma rays, and alpha and beta particles, has enough energy to remove electrons from atoms and molecules, potentially causing damage to biological tissues. Non-ionizing radiation, like radio waves, microwaves, and visible light, has less energy and typically does not cause ionization. The study and management of säteilylähteillä are central to fields like nuclear physics, health physics, and environmental science.