WATER #physics смотреть онлайн

WHAT IS IT??!!!
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This is just pure hot water in VERY special lighting💡conditions . . .
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PHYSICS: What is the cause of this? When water is heated to the boiling point a film of levitating microdroplets (each very small in size at around 10 μm) collect and drift above (not on or in) a hot surface of water. The tiny microdroplets literally levitate above the water surface by 10∼100 μm. You can often see this effect in a cup of black coffee. Additionally and often times, colorful iridescent colors can be seen, which are the result of light scattering within the little hovering droplets and the water beneath them.
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COFFEE TIME: ☕️ So the next time you drink that cup of coffee, don’t forget to notice the “film” of levitating microdroplets hovering just above the hot surface. 😉
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FOR MORE INFO SEE: “Dynamics of microdroplets over the surface of hot water” by: Takahiro Umeki, Masahiko Ohata, Hiizu Nakanishi, Masatoshi Ichikawa Scientific Reports (Nature, 2015). 💥 LINK IN MY IG BIO. CLICK download link.💥 Excerpt below ⬇️
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DYNAMICS OF MICRODROPLETS: “When drinking a cup of coffee under the morning sunshine, you may notice white membranes of steam floating on the surface of the hot water. They stay notably close to the surface and appear to almost stick to it. Although the membranes whiffle because of the air flow of rising steam, peculiarly fast splitting events occasionally occur. They resemble cracking to open slits approximately 1 mm wide in the membranes, and leave curious patterns. We studied this phenomenon using a microscope with a high-speed video camera and found intriguing details: I) the white membranes consist of fairly monodispersed small droplets of the order of 10 μm; II) they levitate above the water surface by 10∼100 μm; III) the splitting events are a collective disappearance of the droplets, which propagates as a wave front of the surface wave with a speed of 1∼2 m/s; and IV) these events are triggered by a surface disturbance, which results from the disappearance of a single droplet.”

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