If I'm outdoors and an airplane flies overhead, it seems like the time during which I hear it and the time during which I see it are staggered. I don't understand why this is, since the planes flying over my yard certainly aren't supersonic.
To explain what I mean, suppose I started a stopwatch at the same instant that a plane began approaching. At 0 sec, I would begin to hear the plane, but I wouldn't see it until 5 sec. Then at 25 sec, I would stop hearing the plane, but continue to see it until 30 sec. (These aren't real measurements, but just for an example.)
Any ideas as to what causes this?
EDIT: At first I didn't think the Doppler effect would have anything to do with this, but maybe it does. Perhaps by the time the plane has almost passed over the frequency of the sound is too low to be audible to humans?
To explain what I mean, suppose I started a stopwatch at the same instant that a plane began approaching. At 0 sec, I would begin to hear the plane, but I wouldn't see it until 5 sec. Then at 25 sec, I would stop hearing the plane, but continue to see it until 30 sec. (These aren't real measurements, but just for an example.)
Any ideas as to what causes this?
EDIT: At first I didn't think the Doppler effect would have anything to do with this, but maybe it does. Perhaps by the time the plane has almost passed over the frequency of the sound is too low to be audible to humans?
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