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Mathematics 19 Online
OpenStudy (anonymous):

I wasn't sure where this question belonged, but it seemed loosely related to math. Does anyone know the name of the plastic picture things that appear to be different images based on the angle at which it is viewed?

OpenStudy (perl):

hologram?

OpenStudy (anonymous):

It's 2D. You know that thing that feels smooth but with ridges.

OpenStudy (perl):

yeah i am familiar, i cant remember the name of it

OpenStudy (anonymous):

Lenticular prints. Praise the heavens for Google's search algorithms.

OpenStudy (anonymous):

http://en.wikipedia.org/wiki/Holography

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