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birding-aus
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| To: | "" <>, "" <> |
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| Subject: | Led Lenser Torches for night birding |
| From: | Peter Shute <> |
| Date: | Sun, 20 May 2012 16:03:40 +1000 |
I'm sure the inverse square law applies, but I wonder if these highly directional beams are still dangerous at greater distances than we're accustomed to. Taking directionality to an extreme, lasers are dangerous, or at least very annoying, from a great distance. Let's assume we're still talking about human eyes. Peter Shute -------------------------- Sent using BlackBerry |
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