yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Let's think about Lightning - Smarter Every Day 15


2m read
·Nov 3, 2024

[Music] [Rainfall and thunder] Hey, it's me, Destin.

So I'm gonna explain why thunder sounds the way it does. And uh, we're in the middle of a thunderstorm here, obviously, so I'm going to try to make this quick.

So basically, if you're standing on the ground here, and let's say there's lightning that happens way up in the sky, really far away from you. So what happens is, as soon as it breaks the sound barrier, that sound wave starts traveling towards your body. But also, the speed of the electricity of the lightning bolt is a lot faster than sound, so that... Oh wow, that's going to be a big one. At least I could see it.

So also, that lightning bolt... [Thunder] outruns the sound. So the sound is simultaneously initiated from all points along the lightning bolt, at the same time. So what happens is you get some cracks that happen before other cracks and you get this low rumble. So you might get... [Thunder] a really low rumble, like that.

So what happens is, if the lightning bolt is really really really far away from you, then all the sound might make it to you at the same time. But sometimes you get this long drawn out thunder rumble, and that's because the sound is coming to you at different points from along the bolt. It has to do with the distance of the lightning bolt, your position and the sound.

So there you go. I know that's not in-depth at all, but I'm in the middle of a thunderstorm. But I hope you're smarter every day and you at least get to think about it. Have a good one. [Thunder]

[Music] ...Good at this, so... I'll show you.

Watch his head stay totally stationary as I move his body. I can move his body in pretty much any direction. Captioning in different languages welcome. Please contact Destin if you can help.

More Articles

View All
5 Things to Know About the Warming Arctic | Before the Flood
If you look at it from space, the top of the world, the white ice acts like a reflector, like a mirror that sends back sunlight and energy and heat back to space. That’s what made the Arctic the cooling system of the planet. I was walking with Leo on the…
Finding your footing in uncertain times: Balancing multiple kids with multiple schedules
The broadcast is now starting. All attendees are in listen-only mode. Hi everybody, thanks so much for joining us today. I’m Vicki Lang. I’m our learning scientist here at Khan Academy, and I’m joined by Dan from our marketing team who will be facilitati…
Introduction to chemistry | Atoms, compounds, and ions | Chemistry | Khan Academy
Here some picture of what most people associate when they think of chemistry. They think of scientists working on a bench with the different vials of different chemicals. They might think of a mad scientist, some of them boiling and changing colors. They …
Living Embodiment of Hindu God | The Story of God
[dramatic music] MORGAN FREEMAN (VOICEOVER): I’m about to have an audience with a living embodiment of the Hindu god, Taleju. My hope is that their Kumari remains expressionless. Even the hint of a smile is said to bring misfortune. [mystical music] MORG…
Ireland’s Underwater World | National Geographic
[Music] [Applause] [Music] The first time I saw it, I just thought, “Oh, how my father would have loved this.” Growing up, I was mesmerized by Cousteau films from the underwater world, and I thought, “Well, that couldn’t be Ireland; that must be some exot…
This Great White Shark Is Hangry For Seal | National Geographic
An apex predator of the ocean, this great white is on the hunt for food. What did you expect at a great white video? These massive fish averaged 15 feet long and can weigh up to 5,000 pounds. But you knew that already, didn’t you? I mean, we’ve seen great…