Sound waves can make underwater bubbles glow like stars
By hitting water with high-frequency sound, scientists can create tiny bubbles that collapse so violently they emit flashes of blue light.
Sonoluminescence is the process of turning sound into light. When an intense sound wave passes through water, it creates a tiny bubble that expands and then implodes in less than a nanosecond. This collapse is so sudden and extreme that the gas inside the bubble reaches temperatures of over 10,000 degrees Celsius—hotter than the surface of the sun—causing it to emit a brief, brilliant pulse of ultraviolet light.
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