Infrared spectrometer, 1954

Infrared spectrometer, 1954

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Caption: Infrared spectrometer. Researcher using an infrared grating spectrometer. This is used to analyse the composition of chemicals by recording the wavelengths at which they absorb infrared radiation. The absorption spectrum is printed out from a roll of paper (centre right). Photographed in 1954, in the Light Division of the National Physical Laboratory, Teddington, UK.

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