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  1. Radiation: Ionizing radiation - World Health Organization (WHO)

    Oct 26, 2020 · Energy emitted from a source is generally referred to as radiation. Examples include heat or light from the sun, microwaves from an oven, X rays from an X-ray tube and …

  2. Radiation - World Health Organization (WHO)

    Jul 10, 2024 · Ionizing radiation is a type of energy released by atoms that travels in the form of electromagnetic waves (gamma or X-rays) or particles (neutrons, beta or alpha). Ionizing …

  3. Radiation and health

    Jul 7, 2023 · At very high doses, radiation can impair the functioning of tissues and organs and produce acute effects such as nausea and vomiting, skin redness, hair loss, acute radiation …

  4. Ionizing radiation and health effects

    Jul 27, 2023 · Ionizing radiation has many beneficial applications, including uses in medicine, industry, agriculture and research. As the use of ionizing radiation increases, so does the …

  5. Radiation: The ultraviolet (UV) index

    Jun 20, 2022 · What does the UV index mean? The levels of UV radiation and therefore the values of the index vary throughout the day. In reporting the UVI, the maximum daily UV level, …

  6. Radiation: Ultraviolet (UV) radiation

    Mar 9, 2016 · The three types of UV radiation are classified according to their wavelength. They differ in their biological activity and the extent to which they can penetrate the skin.

  7. Radiation and health - World Health Organization (WHO)

    Jun 16, 2002 · Non-ionizing radiation is the term given to radiation in the part of the electromagnetic spectrum where there is insufficient energy to cause ionization. It includes …

  8. Radiation and health - World Health Organization (WHO)

    Radiation and health We work to strengthen radiation protection of the public, patients and workers worldwide. We provide Member States with evidence-based guidance, tools and …

  9. Ultraviolet radiation - World Health Organization (WHO)

    Jul 24, 2025 · Ultraviolet (UV) radiation covers the wavelength range of 100–400 nm, which is a higher frequency and lower wavelength than visible light. UV radiation comes naturally from …

  10. Radiation and health - World Health Organization (WHO)

    Dec 12, 2014 · The system of radiological protection aims to control radiation risks without unduly limiting the potential benefits for individuals and for society.