By using a magnifying glass , it is possible to lit up a matchstick. determine the focal length of the magnifying glass, the heat from the sun is than shone onto the focal point of the magnifying glass whereby all the light rays are concentrated at the focal point of the magnifying glass. this is where all the heat is intense and have high temperature. after a period of time, the matchstick will then be able to be lit up by the sun.
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