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Me and My Shadow – A Rule-of-Thumb for Safe Sun Exposure

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An easy way to tell how much ultraviolet (UV) radiation exposure you are getting is to look for your shadow:

  • If your shadow is taller than you are (in the early morning and late afternoon), then your UV exposure is likely to be low.
  • If your shadow is shorter than you are (around midday), then you are being exposed to high levels of UV radiation.

Source: http://www.wsanford.com/~wsanford/exo/sundials/shadows.html

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This entry was posted on Monday, July 24th, 2017 at 1:06 pm and is filed under Research.

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