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Ultraviolet light is typically divided into three categories. UV-A, with wavelengths between 400 and 320 , has been linked with malignant melanomas. UV-B radiation, which is the primary cause of sunburn and other skin cancers, has wavelengths between 320 and 280 . Finally, the region known as UV-C extends to wavelengths of 100 .
Find the range of frequencies for UV-B radiation.

  • physics -

    f₁=c/λ₁=3•10⁸/320•10⁻⁹ =9.375•10¹⁴ Hz
    f₂=c/λ₂=3•10⁸/280•10⁻⁹ =1.071•10¹⁵ Hz

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