DENJIRO: I’m sure we’ve all played with soap bubbles before. But did you know this neat little trick you can do?
GIRL: Huh? The bubble doesn’t stick?
DENJIRO: Strange, no? You’d think that the soap bubble and film would stick together, but there’s actually a thin layer of air between them. Since they’re not directly touching each other, the soap bubble bounces. Let me show you an even more interesting phenomenon. This cup is filled with water. I’m going to put about ten drops of soap in here. I’m making diluted soap water. Let me put a straw into this solution and cover the top with my finger. I’ve got some of the liquid in the straw. Now I’m going to lift the straw above the surface of the liquid and let the liquid fall.
GIRL: It’s a soap bubble!
DENJIRO: These are underwater soap bubbles. With a regular soap bubble, air is surrounded by a soap film. But it’s the opposite with an underwater soap bubble. The soap water is surrounded by a thin film of air. As proof, watch what happens when you pop it. You get very little air bubbles since the only air is the tiny amount on the outside. If you gently drop the liquid, you get droplets on the surface. Just like with how we made the soap bubble bounce using the air in between it and the soap film, this droplet is on top of a thin layer of air. Underwater soap bubbles are formed when the droplet that’s on the thin layer of air gets pushed into the water and wrapped in air. Why does the underwater soap bubble not pop for a long time? The thickness of the underwater soap bubble’s air film is one one-thousandth of a millimeter. Since it’s very thin, the air can move only a bit at a time, and therefore it does not pop.
I hope energy will bring you all happiness. Our magic word is "Happy Energy!”