Re: Light Mill?

[William Beaty <billb@ESKIMO.COM>]

On Tue, 14 Sep 1999, Doug Craigen wrote:

> Spagna Jr., George wrote:
>
> You can get the same "unwinding" effect after removing it from sunlight
> - but the reverse rotation is short lived.  In either case the
> explanation for the reversal requires something not well known.
> "Everybody" know that black heats up faster under illumination, but not
> nearly as many people know that it also cools down faster when removed
> from the illumination.

Or just put it in the 'fridge.  Once it stops turning, you can take it
out, and it will spin slowly because it thinks the room is a radiation
source.   Hey, I bet this would work even better if the device could be
slowly cooled to LN2 temperature without breaking the glass.


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