*Definition of the metre (International Bureau of Weights and Measures, BIPM)*Speed of light in vacuum (National Institute of Standards and Technology, NIST)*Data Gallery: Michelson Speed of Light (Univariate Location Estimation) (download data gathered by Albert A. Michelson)*Subluminal (Java applet demonstrating group velocity information limits)*De Mora Luminis at MathPages*Light discussion on adding velocities*Speed of Light (University of Colorado Department of Physics)*c: Speed of Light (Sixty Symbols, University of Nottingham Department of Physics )*Usenet Physics FAQ*Speed of light illustration (Speed of light as Live-Counter)
*Speed of light in vacuum (National Institute of Standards and Technology, NIST)*Definition of the metre (International Bureau of Weights and Measures, BIPM)*Data Gallery: Michelson Speed of Light (Univariate Location Estimation) (download data gathered by A.A. Michelson)*Subluminal (Java applet demonstrating group velocity information limits)*De Mora Luminis at MathPages*Light discussion on adding velocities*Speed of Light (University of Colorado Department of Physics)*c: Speed of Light (Sixty Symbols, University of Nottingham Department of Physics )*Usenet Physics FAQ*The Fizeau "Rapidly Rotating Toothed Wheel" Method