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To:
jwalsh07
On a dark night, you could even see a candle flame flickering up to 30 mi. (48 km) away.
190
posted on
11/24/2015 10:04:01 AM PST
by
jpsb
(Believe nothing until it has been officially denied, Otto Von Bismarck)
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To:
jpsb
http://www.technologyreview.com/view/539826/how-far-can-the-human-eye-see-a-candle-flame/
203
posted on
11/24/2015 10:18:15 AM PST
by
jwalsh07
(.)
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