In this commercial for Japanese optical high-speed internet service provider au Hikari, a Rube Goldberg machine (or Heath Robinson contraption, if you like) is “powered” by a single beam of light reflecting off mirrors and passing through lenses to burn through strings, melt ice, pop balloons and generally put the fizz into physics.
Here’s how they did it.
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Anyone know why they don’t do this on a a grand scale?
Surely a good source of renewable energy?