[thackney]

Havn’t you ever noticed at high elevations, like on a mountain, you see things before you hear the sound they make?

That is always the case, noticeable at significant distances.

The speed of light is always going to be far greater than the speed of sound, at any elevation.

[mamelukesabre]

When you are over a mile up, it is noticeable at much less than significant distances.