- #1
peterparker
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Today I was watching the full moon while I had one eye closed. There was a vertical metal rod which, by moving my head a bit, covered the moon completely, so that no direct light could hit my eye. (Yeah... I do things like that...)
I saw a thin line of moonlight parallel to the rod right at the edge of it.
It looks like the metal would bend the light along its surface for maybe a degree or so.
It doesn't seem to be a property of the metal, because a painted wall has the same effect, but less bright.
Does anyone know how this effect is called?
Thanks for solving this mystery, it puzzles me since I was a child :-D
Kind regards
peterparker
I saw a thin line of moonlight parallel to the rod right at the edge of it.
It looks like the metal would bend the light along its surface for maybe a degree or so.
It doesn't seem to be a property of the metal, because a painted wall has the same effect, but less bright.
Does anyone know how this effect is called?
Thanks for solving this mystery, it puzzles me since I was a child :-D
Kind regards
peterparker