Underwater Explosions at 120,000fps - The Slow Mo Guys

Too bad they didn't tape up three or four together and light them for a final sequence. That would be interesting to see the different cavitation balls interacting with each other.

About your question at 5:35: 'whatever is inside it'. The banger produces a certain amount of hot gas, which is what causes the light. That is generated suddenly, at high pressure. That high pressure spike pushes the water away in a spherical bubble. So initially, the bubble is filled with gas. The water around the bubble is accelerated by the gas pressure. As the bubble expands, the pressure in the bubble decreases, causing its temperature to drop. Thus it stops emitting light. At some point, the pressure in the bubble drops below the ambient pressure, and will start to decelerate the waterfront around the bubble. But due to the amount of kinetic energy in the water, it can not stop immediately. The bubble will continue to expand even as the pressure in the bubble drops to near vacuum, but the speed of the water is decreasing. At some point, the water comes to a stand still. At that point, the bubble is at its maximum, and inside is a near vacuum. The water will be drawn back in to fill the vacuum. As that happens, the pressure inside the bubble will rise again, heating up the gas inside. At some point it starts to glow again, just before the bubble collapses. During the internal collisions as the bubble collapses, most energy of the blast is dissipated. Thus we do not see a second spherical bubble. What remains is an irregular 'cloud' of combustion gasses, at near-ambient pressure. This cloud is pushed to the surface by the water it displaces. So the short answer is: the bubble is filled with a modest amount of combustion gasses. When the bubble is at its maximum, the pressure inside is near 0 Pa (absolute).

Inside those explosion, a micro planets, suns had emerged and life had flourished on it, then the micro universe ends

5:19 is like an invisible coin that was revealed in a fraction of a second

at this point, i'm convinced that Slow Mo Gav and Achievement Hunter Gav are two completely different people.

I'm so glad you guys showed the full explosion at 2 exposures. What a great few seconds of footage.

05:19 When a light flashes when everything is almost stopping. Beautiful

It would be nice to see interaction of 2 or more explosion cavities.

please do video with hydraulic Press Channel and crush something in slowmo

Gav: "Do it at the normal frame rate" Dan: TRIGGERED 4:29

These videos are a window in to another world. It really shows that we experience reality at one speed but the universe exists and lives at all speeds regardless of us. Beautiful.

Have you ever considered picking a single, ultra cool frame and selling nice frame-worthy prints ?

pls do nuclear bomb slow mo next

Always wondered what is the average file size of these very high fps clips?

After looking at slow mo videos, most of times it changes perspective of looking at life. So much in tiny bits...

2:19 bless u 🙂

Idk where they live but it's like summer all year

Those explosions made me think of space and stuff

I am so mesmerized by this video. It is artistic, philosophical, and scientific, all in one. And so neutral.

Im sorry it took me so long to subscribe but ur content is amazing been watching for a while. Love the humor also