As part of the workshop you can see a heat map of yourself using
an infrared camera.
The world appears quite different when you look at it with wavelengths
of light beyond the ‘visible’ part of the spectrum which
we see with our eyes. To do this requires cameras which collect
the non-visible wavelengths turning them into pictures which we
This image is coming directly from the infrared camera and actually
shows heat emitted from your body.
The coloured bar on the right shows how the colours in the image
correspond to temperature.
infrared camera records light with wavelengths around one ten-millionth
of a metre which is about twenty times longer than visible light.
A millimetre wave camera can also show heat but in a slightly different
way since the wavelengths are a further 300 times longer than those
collected by the infrared camera.
Hair appears cold since it is insulating and doesn’t let
heat escape from your head. Your nose and ears are usually the coldest
part of your head whereas your eyes are generally the hottest part.
Although visible light (light that our eyes see) can go through
glass, infrared light can't and that is why glasses look black.