Brain teaser

What makes the veins rotate?  Not so easy to undertand if you’re limited to Einstein level.  Come up to Roger Spurr level.

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2 Responses to “Brain teaser”

  1. ian says:

    First time I’ve seen that effect Henry. Light however is energy, and if the UVb is absorbed by the black side and reflected from the white side, it causes rotation. We however were just taught that light was visible. It’s ability to apply force was never mentioned. Very interesting.

  2. Tapestry says:

    Light also makes sound when moving slowly enough, Ian….Einstein review – fail!!!