Some of you may know I'm a big proponent of wearing masks to slow the spread of the virus that causes Covid-19. I've posted videos demonstrating the benefits of masks. This, IMHO, is one of the best videos out there that truly demonstrate that masks DO WORK to slow the spread of the virus. It is also very easy to understand and follow. The images on this video are absolutely breathtaking. Please watch........
How Well Do Masks Work? (Schlieren Imaging In Slow Motion!) - YouTube