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
Ancient Olympic pentathlon all five of the events. This method is impractical, for the prize would have hardly ever been awarded. Another hypothesis is that perhaps an athlete who was victorious in just three events, was declared the overall winner. One of the more common theories is that only a certain number of competitors would qualify for the final event, wrestling, based on their performance in the previous four events. Ultimately, the victor of wrestling would be deemed the champion of the entire pentathlon. Ancient Olympic pentathlon The Ancient Olympic pentathlon () was an athletic contest at the Ancient Olympic Games, and other