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1 .This is Scientific American's 60-Second Science. I'm Wayt Gibbs. Got a minute?
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2 .When you brushed your teeth this morning, the image starting back at you from your bathroom mirror was imperfect.
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3 .Now, I'm sure you're a lovely person.
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4 .It's just that there is no such thing as a perfect mirror.
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5 .Even the shiniest surface absorbs or transmits at least a tiny bit of the light that hits it.
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6 .Or so it was thought until recently, when Chia Wei Hsu and his colleagues at M.I.T.reported in Nature that they created a virtually perfect mirror.
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7 .It's made from the stuff of microchips: silicon, a layer of silicon dioxide, and on top a very thin film of silicon nitride,
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8 .which is perforated by a grid of microscopic circular holes.
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9 .When light hits that sieve-like surface at the just the right angle about 35 degrees,
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10 .the quantum wave functions that govern the light interfere in such a way that there is no viable path for the photons other than to bounce off.
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11 .So that's what they do.
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12 .This phenomenon should work for all kinds of waves, not just light, but also sound and even water waves.
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13 .But the most obvious application is to make more efficient and powerful lasers.
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14 .Dr. Evil, are you listening?
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15 .Thanks for the minute, for Scientific American's 60-Second Science. I'm Wayt Gibbs.
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