Re: [amsat-bb] Mystery effect

[John Franke <j.m.franke@xxxxxxxxxxxxx>]

The common radiometers with black and white vanes are not enclosed in 
a vacuum.  There is a low pressure atmosphere in the glass dome.  The 
vanes actually rotate the reverse direction to what photon recoil 
would predict.  The vanes are driven by the gas atoms recoiling from 
the different temperature vane surfaces.

John  WA4WDL


>Tom,
>
>Another very persuasive argument.  It reminds me of an experiment I observed
>in high school of a black/white  vane rotating in a vacuum while exposed to
>a visable light irradiation.
>
>Photon mass?  Perhaps I need another physics course.
>
>73 again de Ken - K5GUU
>
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