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Crookes Radiometer Single
Product Code: SUK-SCHOOL-SSLAB-D000139
Description & Specifications
Crookes Radiometer Single
Technical Specification
The comprising partly evacuated glass bulb approx 70mm dia, with
contained at its centre a fine pivot which supports four lightweight
metal arms. One side of each vane is blackened, the reverse side is
white. Discussion of the mechanism turning the vanes covers several
areas of physics including thermal radiation and absorption thermal
transfer air pressure and momentum of gas molecules. Infrared radiation
heats the black faces of the vanes more than the white, causing a
pressure difference on either side of the vanes which drives the vanes
round, providing a pleasant visual demonstration of several physical
effects.The unit is mounted on a round plastic base.
