The magnifying glass, a convex lens, is often used to read small letters and make objects or photos appear larger. According to ABC News, astronomers recently used a "cosmic magnifying glass" to detect a Jupiter-like planet in the Milky Way. In our growing-up years, some of us could successfully learn to use a magnifying glass in a scientific yet fun way and show our friends how to start a fire without matches.
"When (light) hits a curved surface, that can cause the light rays to become concentrated, and that can cause a fire. That's how a magnifying glass works," Nicole Moore, an assistant professor of physics at Gonzaga University, told The Spokesman-Review.
Interestingly, the same principle applies if you need to start a fire with ice. According to HuffPost, all you need is a clear disc-shaped piece of ice, dry tinder, and sunlight to create the magic. If you are stuck on a campsite in freezing temperatures, you may also need a sharp knife to help you carve out a giant mass of ice from a nearby frozen lake.
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