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Last Post 10/3/2006 1:31 PM by  Terry Kucera
UV Rays
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Anonymous





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10/3/2006 8:15 AM

    Why can some UV rays get through the atmosphere but some UV rays can't get through?


    Terry Kucera



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    10/3/2006 1:31 PM
    Hi,
    UV rays are blocked by the ozone layer high in our atmosphere. The ozone blocks some kinds of UV light better than others. For instance, the UV light that is lower in energy (just a little bit bluer the blue!) can get through more easily. For some of these energies the atmosphere acts like a dirty window - some of the light can still get through.
    Also, the ozone is thinner at some times and places (you may have heard of the ozone hole in Antarctica).

    Terry
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