Ano nga ba ang ultraviolet radiation


  • Réponse publiée par: christiandumanon

    Ultraviolet (UV) radiation is a form of electromagneticradiation. The main source of UV radiation (rays) is the sun, although it can also come from man-made sources such as tanning beds and welding torches.

  • Réponse publiée par: ian2145
    Hindi ko maintindihan ang tanong
  • Réponse publiée par: shannel99

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Ano nga ba ang ultraviolet radiation...