Radiation - Wikipedia
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or a material medium. [1][2] This includes: Radiation is often categorized as …
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 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.
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 …
Radiation and Your Health | CDC
Learn about strategies that can help you stay safe from radiation. Learn about ionizing radiation and its medical applications such as diagnostic testing. Learn about the potential health effects …
What Are The Different Types of Radiation? | Nuclear ... - NRC
There are four major types of radiation: alpha, beta, neutrons, and electromagnetic waves such as gamma rays. They differ in mass, energy and how deeply they penetrate people and objects.