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The interesting properties of a concave mirror
A tour guide demonstrates a giant concave mirror that creates a perfect image. Exploratorium San Francisco 2014.
Posted 10 years ago by Hannab in category: crazy
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Garethp - 10 years ago [ Reply ]
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It's just a mirror!

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Schattenspringer (guest) - 10 years ago [ Reply ]
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Americans are exploring a mirror! we in Europe know it since the middleage! :-)

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