Listening To Colors In Ancient Art, Thanks To Alexander Graham Bell

McGill chemists using a technique known as photoacoustic infrared spectroscopy say they can  identify the composition of pigments used in art decades or even centuries old. Pigments give artist's materials color and they emit sounds when light is shone on them, and Fourier-transform photoacoustic infrared spectroscopy is based on Alexander Graham Bell's 1880 discovery that showed solids could emit sounds when exposed to sunlight, infrared radiation or ultraviolet radiation. More recent advances in mathematics and computers have enabled chemists to apply the phenomenon to various materials. read more

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