Have a look at yourself as seen by a heat-sensitive camera!

On the left, an "ordinary" camera, which takes photographs. On the right, an infra-red (heat-sensitive) camera. Since we don't want heat coming from the camera itself to be recorded on the images, the camera is cooled with liquid nitrogen, poured in through the funnel.

Kids waved their hands in front on the IR camera to see what parts of their bodies was the warmest, and most bright on the screen. Then, they were asked to pose so that both cameras could take their pictures. Printed copies were given to the teachers.

Infra-red cameras are used in astronomy, and this was explained in a poster presented here by Bob.

Bob (left) and Greg (right) answered all questions.