Via Wikipedia: "The Crookes radiometer, also known as the light mill or solar engine, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity. The reason for the rotation has been the cause of much scientific debate."
that wasnt a song
vik95170 2 years ago
that wasnt a song :O :S :( :'(
charliesyellow 3 years ago
dont like the music its creepy
stirlingsteamboy08 3 years ago
WEEE!!!
GorillaDude94 3 years ago