Question

wt is the speed of light in vacuum​

Answer 1

Answer:

The metre is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second. This defines the speed of light in vacuum to be exactly 299,792,458 m/s.

Answer 2

Answer:

Speed of light in vacuum= 299792458 m/sec

$speed \: of \: light \: in \: vacuum = 3.0 \times {10}^{8} \: m \: {sec}^{ - 1}$