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INFOFUSE

A thin strip of nitrocellulose dotted with chemicals can send out a message as it burns (shown clockwise). The blue flame shown here is produced by copper perchlorate burning, and the reddish orange flame by calcium perchlorate. Although the wavelengths emitted by the burning chemicals used in the experiment can’t be seen with the eye, the chemicals shown here provide a scale of a burning infofuse. Credit: Sam Thomas

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