Speed Of Light Per Second In Air. The speed of sound through air is about 340 meters per second. The value of 299,792,458 meters per second (186,282 miles per second) is the speed of light in a vacuum.

The speed of light in scientific notation is c = 3.00 x 108 m/s. The speed of light is 299,792,458 meters per second and that constant tells us much about cause and effect in the universe.