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WHAT'S THE DEMONSTRATION?

From the November 2009 issue of The Christian Science Journal


WHEN I WAS A KID, someone told me that sunlight shining through a magnifying glass could burn a hole in a piece of paper. So, I went out into the sun and held a magnifying glass a few inches above a piece of paper—and sure enough, the light shining through the magnifier became so concentrated that it burned a hole in the paper.