How Well Do Masks Work? (Schlieren Imaging In Slow Motion!)

↓ More info and sources below ↓ Wearing a mask is a cheap and easy way to help stop the spread of airborne infections like COVID-19. It's also a sign that you want to help protect other people and have them protect you… that we're all in this together. Here are some awesome slow-motion schlieren...

8 min - Science & Tech - Be Smart

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