2020-08-22, 12:29
Scientists Put Masks to the Test—With a Cell Phone and a Laser
Not all face coverings—like masks, bandanas, and neck gaiters—are equally good at blocking germs. A new, low-cost testing device literally illuminates the difference.
https://www.wired.com/story/scientists-p...nd-a-laser
Not all face coverings—like masks, bandanas, and neck gaiters—are equally good at blocking germs. A new, low-cost testing device literally illuminates the difference.
https://www.wired.com/story/scientists-p...nd-a-laser