What is another word for background radiation?
Pronunciation: [bˈakɡɹa͡ʊnd ɹˌe͡ɪdɪˈe͡ɪʃən] (IPA) 
Background radiation refers to the natural and constant radiation present in the environment, which comes from various sources such as the sun, soil, building materials, and cosmic rays. Several synonyms for background radiation include ambient radiation, natural radiation, environmental radiation, and residual radiation. Ambient radiation is used to describe the low-level radiation that always surrounds us, while natural radiation refers to the radiation that occurs naturally in the environment. Environmental radiation is also a common term used to describe background radiation because it is present in the air, water, and soil. Lastly, residual radiation is used to indicate the radiation that lingers after a nuclear test or accident. All these synonyms describe the constant radiation in the background that we live with every day.
