If a piece of ice is given the shape of a convex glass, then it can be used to light a match on a clear winter day. Why?
| April 12, 2021 | education
Because such a piece of ice will act as a lens that focuses sunlight into a narrow beam, which leads to an increase in its energy per unit area, and therefore in temperature. If the temperature of the light beam reaches the ignition temperature of the sulfur in the match, the match will light up.
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