Question

The speed of light in a vacuum is approximately 0.3 gm/s. What is the speed of light in meters per second?

Answer 1

We have to convert Gm/s to m/s.

As  $1 \ Gm/s = 10^9 \ m/s$

Therefore the speed of light in vacuum,

$c = 0.3 \ Gm/s = 0.3 \times 10^9 \ m/s \\\\ c= 3 \times 10^8 \ m/s$

Thus, the speed of light in m/s is $3 \times 10^8 \ m/s$