Question

what is the exact speed of light in vacuum?​

Answer 1

Answer:

hey dear ,,,

The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph.

If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.

hope it's helpful for you.

Answer 2

THE SPEED OF LIGHT IN VACCUM IS 299,792 km/s

hope this helps mark this as the BRAINLIEST ANSWER