Burning glass extremely high temperatures without the need for fuel or large supplies of electricity. They sometimes employ a large parabolic array of mirrors (some facilities are several stories high) to focus light to a high intensity. The Olympic torch that is carried around the host country of the Olympic Games is lit by a burning glass, at the site of ancient Olympia in Greece. Burning glass A burning glass or burning lens is a large convex lens that can concentrate the sun's rays onto a small area, heating up the area and thus resulting in ignition of the exposed surface. Burning
London 2012 Olympic Torch torchbearer runs. The torch has two layers: an inner and an outer 'skin' with 3,600 and 4,400 holes respectively, held in place by a top and a bottom casting. The pattern created by the perforations and the overlapping layers was inspired by the Olympic rings. The components are laser-welded together and the holes are laser cut. The London 2012 Torch is one of the lightest Olympic torches. It is made from gold PVD-finished aluminium. A torch was produced for every torchbearer (8,000); each weighs around and stands tall. The weight was achieved to ensure the torch was able to be