'One measure of this constant in a vacuum is 299,792,458 meters per second'
the speed of light
MY SPACE: One measure of this constant in a vacuum is 299,792,458 meters per second
One measure of this constant in a vacuum is 299,792,458 meters per second
One measure of this constant in a vacuum is 299,792,458 meters per second
MY SPACE
the speed of light
MY SPACE