WM9.1 Infrared Detector
An infrared detector is attached to a galvanometer. It measures body heat in essence. There are heat coils to provide heat, but the class can also be used. Find out who's hot and who's not.
WM9.2 Radiation Pressure (Radiometer)
The apparatus is two evacuated tubes that have black fms. A match is brought nearby--which has infrared heat--and the photons from the match strike the fins. Since the fms absorb the infrared, they gain the photons momentum. Thus the fms begin to spin.
WM9.3 UV Absorbing Plates
These are sheets of metal covered with black UV absorbing paint. To contrast this, either shine the light on the class or a volunteer.