Infrared Hand in Bag
Infrared light can penetrate some materials which visible light cannot travel through. Notice, in the visible light image, that you cannot see the man's hand in the bag. With an infrared camera however, we can detect the heat from the man's arm and hand and "see" through the black bag. Infrared light can also penetrate thick smoke and fog. This makes infrared cameras very useful in navigation, and for the rescue of people hidden in the thick smoke generated by fires. To learn more about the benefits of infrared technology see our module Seeing Our World in a Different Light.