Abstract
WE report here the completion of a determination of the speed of light at the National Physical Laboratory1. The value was obtained from the product of the measured frequency and the wavelength, determined through up-conversion, of the radiation from a CO2 laser stabilised to the R(12) transition of CO2 at 9.3 μm. © 1974 Nature Publishing Group.
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APA
Blaney, T. G., Bradley, C. C., Edwards, G. J., Jolliffe, B. W., Knight, D. J. E., Rowley, W. R. C., … Woods, P. T. (1974). Measurement of the speed of light. Nature, 251(5470), 46. https://doi.org/10.1038/251046a0
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