Question

what is the speed of light in vaccum

Answer 1

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is 299,792,458 metres per second.

Answer 2

${\sf{\red{ \underline{{\blue{The \: speed \: of \: light \: is \: { \orange{3 \times {10}^{8} } \: \frac{m}{s} \: .}}}}}}}$