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It's Okay to Be Smart: Why the Heck Is Glass Transparent?

5 minutes 42 seconds

Now Playing As: Captioned (English) (change)

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Glass is made of sand, which is a kind of rock. But glass is transparent, and rocks aren’t. So, why is glass clear? Part of the "It's Okay to Be Smart" series.

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Runtime: 5 minutes 42 seconds

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