this is stupid. something about activation energy? are there any activation energy hacks?

  • Psych
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    fedilink
    223 days ago

    Still I don’t understand does shadows have something to do with vitamin D ?

    • @Fermion@feddit.nl
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      fedilink
      323 days ago

      If you have a long shadow, the sunlight that gets to you has gone through much more atmosphere which attenuates the ultraviolet light. So at high/low lattitudes and during morning/evening hours the amount of uv that gets to the surface is much lower.