Speed of Light from Direct Laser Frequency and Wavelength Measurements: Emergence of a Laser Standard of Length



Recent frequency and wavelength measurements of a methane stabilized laser yield a value of the speed of light 100 times less uncertain than the previously accepted value. Various possibilities using lasers as radiation sources for a new length standard are discussed. One possibility is to fix the value of the speed of light in the redefinition of the meter.


Length Standard Laser Frequency Beat Note Transfer Laser Biconical Antenna 
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Copyright information

© Plenum Press, New York 1974

Authors and Affiliations

  1. 1.Quantum Electronics DivisionInstitute for Basic Standards, National Bureau of StandardsBoulderUSA

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