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How to Convert a Digital Watch to a Negative Display

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Re: How to Convert a Digital Watch to a Negative Display

#5
post #4

The "magic" explanation doesn't satisfy me. Any physicists in the crowd who can explain why rotating the film 90 degrees creates a negative display?

Polarization.

This article contains helpful diagrams and an obtuse but reasonable explanation:

http://www.gizmag.com/stealth-computer-display-lcd-polarizin...

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