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Teaching You things that nobody does on Instagram: "Using air bubbles to see underwater works because of how light bends at the boundary between air and water. When you trap a thin layer of air against your hand, that air-water interface changes refraction, briefly reducing distortion and glare that normally blur underwater vision. Water bends light more than air, which is why everything underwater looks warped. The trapped air acts like a temporary optical window, letting light travel more clea