
Radiation - Wikipedia
The radiation emitted covers the entire electromagnetic spectrum and the intensity of the radiation (power/unit-area) at a given frequency is described by Planck's law of radiation.
Radiation | Definition, Types, Effects, & Facts | Britannica
Nov 4, 2025 · All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources. This article delineates the properties and behaviour of radiation and the …
Radiation Basics - US EPA
Sep 10, 2025 · Radiation is energy. It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of …
What is Radiation? - International Atomic Energy Agency
Jan 25, 2023 · Radiation is energy that moves from one place to another in a form that can be described as waves or particles. We are exposed to radiation in our everyday life. Some of the …
What is Radiation and What Types of Radiation Are There?
Radiation is energy that comes from a source, travels through space and may be able to penetrate various materials.
About Health Effects of Radiation | Radiation and Your Health
Feb 19, 2024 · Radiation can damage the DNA in cells, and high doses can lead to cancer later in life. We've been studying the effects of radiation on living tissue for more than 100 years. By …
Radiation Basics | Nuclear Regulatory Commission - NRC
Radiation is energy given off by matter in the form of rays or high-speed particles. All matter is composed of atoms. Atoms are made up of various parts; the nucleus contains minute …
Radiation - World Health Organization (WHO)
Jul 10, 2024 · Radiation is energy that travels in the form of waves or particles and is part of our everyday environment. People are exposed to radiation from cosmic rays, as well as to …
Side-Effects of Radiation Therapy for Cancer Treatment - WebMD
Oct 8, 2024 · Radiation therapy treats cancer by using high-energy waves to kill tumor cells. The goal is to destroy or damage the cancer without hurting too many healthy cells.
What is Radiation? - UCSF Radiology
Radiation is a form of energy that travels through space or matter. It's all around us, coming from both natural and man-made sources. We are all exposed to radiation every day, mainly from …