Speed of Light
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 | \(\large{\frac{ft}{sec}}\) | \(\large{\frac{m}{s}}\) |