A new four-stroke apparent motion demo (reversed phi and 'reversed' reversed-phi) (demonstrated in the form of phenomenal phenomena) Rings appear to rotate clockwise, though they spin clockwise and counterclockwise to and fro.pic.twitter.com/h8MxFLYSYR
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Rings appear to rotate clockwise.pic.twitter.com/lRfEo3tnsm
2:57 AM - 9 Apr 2020
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