17 Dec
2003
17 Dec
'03
11:17 p.m.
Anonymous wrote:
Perpetual motion machines built on violations of thermodynamics involving hemispherical and ellipsoidal mirrors have been around for years. They don't work.
The objects do not change temperature.
Actually, when I did this experiment several years ago, the objects did change temperature (about 1 degree centigrade) but it may have been due to outside light getting in.