Ultraviolet waves cover a range of frequencies. Scientists divide this range into three types, UVA, UVB and UVC. The table in Figure 14 shows the frequency range for each type. Earth’s atmosphere has on three types of ultraviolet radiation. Describe how the effects change with wavelength and the width of the arrows drawn indicates the amount of radiation that is involved – 8011

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1. UVA is mostly transmitted or only some is absorbed.

   UVB is partly transmitted or mostly absorbed.

   UVC is not transmitted, mostly absorbed, or some is reflected.

   As the wavelength decreases, absorption increases and transmission decreases.

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