define speed of light
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Speed of light, speed at which light waves propagate through different materials. In particular, the value for the speed of light in a vacuum is now defined as exactly 299,792,458 metres per second. Speed of light. Quick Facts.
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[tex] \underline \mathtt \color{magenta}what \: is \: speed \: of \: light[/tex]
Speed of light, speed at which light waves propagate through different materials. In particular, the value for the speed of light in a vacuum is now defined as exactly 299,792,458 metres per second.
Ole Roemer discovered the speed of light