0 Morty Asked: November 7, 2019In: PhysicsWhen an airplane flys over you why is the sound far behind it?0I’ve noticed that when you hear the sound and look up, the plan often isn’t there. It is always in front of where the sound is.In: Physics ShareFacebook 3 AnswersVoted msanangelo Added an answer on November 8, 2019 at 12:08 am Simple answer is light travels faster than sound.I live near an airport so planes are usually close enough to the ground that I can hear them before the actually cross over. That is a commercial airliner flying somewhere between 500-600 mph I think. A plane at 30k feet plus seems silent somehow.Military jets can fly faster than the speed of sound so naturally the sound seems to lag. It’s kinda neat imo.0Reply Share ShareShare on FacebookShare on TwitterShare on LinkedInShare on WhatsApp UntangledQubit Added an answer on November 8, 2019 at 12:02 am Light takes tens of microseconds to get to you, while sound takes tens of seconds to get to you. So, when you look up, you see the plane as it was microseconds ago (basically now), but the sound it emits is still way above you – the sound from 30 seconds ago is just now getting to you, making it seem like it’s coming from behind the plane.0Reply Share ShareShare on FacebookShare on TwitterShare on LinkedInShare on WhatsApp V2LenKagamine Added an answer on November 8, 2019 at 12:01 am Sound moves slower than light. So the light of where tge plane is gets to you faster than the sound.0Reply Share ShareShare on FacebookShare on TwitterShare on LinkedInShare on WhatsAppLeave an answerLeave an answerCancel reply Attachment Select file Browse Featured image Select file Browse What is the capital of UK? ( London )Save my name, email, and website in this browser for the next time I comment.