Comments on: Osaka Water Clock [Saturday Timewaster]

By: Osaka Water Clock | 4 Youth Magazine

Osaka Water Clock | 4 Youth Magazine — Sun, 16 Feb 2014 19:58:06 +0000

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By: Jonadab the Unsightly One

Jonadab the Unsightly One — Thu, 13 Oct 2011 10:44:00 +0000

I don’t know about color, but there’s definitely special lighting involved. Specifically, all the lighting in the vicinity of the clock has to flicker at a carefully controlled rate, and the timing of the flicker must be carefully coordinated with the timed release of the water drops (or vice versa) so that the droplets are only lit for very short intervals when they’re in exactly the right position.

Well, either that or you need antigrav technology, but the flickering light is easier.

There’s a much simpler demonstration of the same principle at COSI (sort of a combination between a science museum and small indoor amusement park, located in Columbus). Theirs only uses a single drop of water at a time, so it doesn’t make any pictures or show the time, but they’ve controlled the timing so it looks for all the world like one drop of water is dripping very slowly, and then it appears to hover in midair and then start to levitate back upward…