Subject: 🗣💨 😷How Well Do Masks Work? (Schlieren Imaging In Slow Motion!)
via PBS
How Well Do Masks Work?
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’s some awesome slow-motion schlieren imaging experiments to demonstrate why masks work! Share with someone who needs to see this.
