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  • This Is What It Must Feel Like To See The Invisible

    This Is What It Must Feel Like To See The Invisible

    Video: It’s called the Schlieren effect and it means that you can see things that are invisible to the human eye, like changes in air density. So when you turn on a hair dryer, you can see the blast of air it shoots out. When you open a can of Coke, you can see what’s…