The Crookes Radiometer ·
The Spinning Vanes That Fooled Physicists
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.com · black soaks up light · gas creeps at the edge · the black side retreats
Spin
0 rpm
Gas
~1 Pa
Now
LIGHT-MILL
Shiny face — reflects, cool
Black face — absorbs, warms
Gas creep: cool → warm edge
Thin residual gas (partial vacuum)
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.com · The Crookes Radiometer