Ferrohydrodynamic Lens

Ferrohydrodynamic Lens

Ferrohydrodynamic Lens

A ferrohydrodymainc lens, edge-lit with 36 alternating red, green and white LEDs around its circumference, creates a colorful pattern when acted on by a ring magnet on its surface. Note the artificial “black hole” in the center where light goes around but not in. 

—Timm A. Vanderelli, independent researcher

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