claim: normally invisible saliva droplets can spread in the air, visualized by researchers using laser technology.
evidence_1: he runs a laser lab normally used to study protein structural dynamics, but was able to use that technology to investigate the hunch that normal speaking produces small droplets that can spread disease.", "whereas large droplets fall quickly to the ground, small droplets can dehydrate and linger as droplet nuclei in the air, where they behave like an aerosol and thereby expand the spatial extent of emitted infectious particles.2 we report the results of a laser light-scattering experiment in which speech-generated droplets and their trajectories were visualized.", 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  "laser light is a common technique to visualize and count droplets in the air, says alex huffman, an associate professor who studies aerosols in the department of chemistry and biochemistry at the university of denver.", "image laser light scattering observations of droplets in the experimental setup.credit...valentyn stadnytskyi; philip anfinrud; christina e. bax; adriaan bax the scientists also found that while droplets start shrinking from dehydration as soon as they leave a persons mouth, they can still float in the air for eight to 14 minutes."
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  )