About This Lesson
How many times have you heard a jet plane going over, looked up to see it, but not been able to find it even though you were looking toward where the sound was coming from?
Sometime during your life you might have been told that the plane wasn’t with the sound because it was traveling faster than the speed of sound. It might have been, but it didn’t have to be going that fast in order to appear to be separated from the sound.
