Firstly, let me introduce to you of what is a magnifying glass. A magnifying glass is a convex lens which is used to produce a magnified image of an object.
How does it work? It works by creating a virtual magnified image of an object behind the lens.
Well, referring to today's post: How does a matchstick be lite up with a magnifying glass?
According to my researches on the Internet, I have found some appropriate answers for today's post!
By focusing the rays of the Sun on a pile of dry leaves, grass or grass roots, a fire can be started.
www.youtube.com/watchv=TiKM4TVTmjU&feature=player_embedded :-)
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