Speed of Light

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Speed of light, abbreviated as c, in a vacuum, travels at a speed of exactly 299,792,458 meters per second, or about 300,000 kilometers per second, a speed which remains constant irrespective of the speed of the source of the light or of the observer.

 

Speed of Light formula

\(\large{ c =  \lambda \; f     }\)  

Where:

 Units English Metric
\(\large{ c }\) = speed of light \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ f }\) = frequency \(\large{Hz}\) \(\large{Hz}\)
\(\large{ \lambda }\)  (Greek symbol \lambda) = wavelength \(\large{ft}\) \(\large{m}\)

 

Speed of Light in Vacuum Constant

\(\large{ \sigma = 9.83571056 \;x\;10^{-8} \; \frac{ft}{sec}  }\)
\(\large{ \sigma = 2.99792458 \;x\;10^{-8} \; \frac{m}{s}  }\)

Where:

 Units English Metric
\(\large{ c }\) = speed of light \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)

 

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Tags: Equations for Constant Equations for Speed