Nov 4, 2025 · Radiation, flow of atomic and subatomic particles and of waves, such as those that characterize heat rays, light rays, and X rays. All matter is constantly bombarded with radiation …

Light, sound, heat, and X-rays are examples of radiation. The different kinds of radiation fall into a few general categories: electromagnetic radiation, mechanical radiation, nuclear radiation, and …

Starting with lowest energy (longest wavelength) and moving up to highest energy (shortest wavelength), the subcategories of the electromagnetic spectrum are radio waves, infrared …

Radiation - Particles, Waves, Energy: Matter in bulk comprises particles that, compared to radiation, may be said to be at rest, but the motion of the molecules that compose matter, …

Oct 28, 2025 · electromagnetic radiation, in classical physics, the flow of energy at the universal speed of light through free space or through a material medium in the form of the electric and …

Oct 11, 2025 · The ozone layer effectively blocks almost all solar radiation of wavelengths less than 290 nm from reaching Earth’s surface, including certain types of ultraviolet (UV) and other …

Nov 6, 2025 · Infrared radiation, that portion of the electromagnetic spectrum that extends from the long wavelength, or red, end of the visible-light range to the microwave range. Invisible to …

Sep 26, 2025 · Ionizing radiation, flow of energy in the form of atomic and subatomic particles or electromagnetic waves that is capable of freeing electrons from an atom, causing the atom to …

Oct 21, 2025 · Radiation therapy, the use of ionizing radiation (high-energy radiation that displaces electrons from atoms and molecules) to destroy cancer cells. In addition to treating …

Nov 4, 2025 · Radiation - Imaging, Therapy, Detection: The uses of radiation in diagnosis and treatment have multiplied so rapidly in recent years that one or another form of radiation is …