The speed of light through air is not measured in seconds. It's measured in meters per second (m/s).

Here's why:

* Speed is a measure of how fast something is moving. It's calculated by dividing the distance traveled by the time it takes to travel that distance.

* Seconds measure time.

* Meters per second tells us how many meters something travels in one second.

The speed of light in a vacuum (which is very close to the speed in air) is approximately:

* 299,792,458 meters per second (m/s)

Let me know if you have any more questions!