(CNN) Schools are reopening, amusement parks are welcoming back visitors, and outdoor dining is the new way to eat out. That's why a group of researchers at Duke University created a simple technique to analyze the effectiveness of various types of masks which have become a critical component in stopping the spread of the virus. The professor wanted to make sure the group purchased masks that were actually effective. A visual aid showing how the laser beam and sheet of light work to capture respiratory droplets. "The laser beam is expanded vertically to form a thin sheet of light, which we shine through slits on the left and right of the box."

Source: CNN August 08, 2020 23:26 UTC