Submitted by Lokarin t3_1061svn in askscience
Lokarin OP t1_j3fe1jr wrote
Reply to comment by CryptographerSmall45 in Are gaiters at least partially effective at blocking aerosols? by Lokarin
> The researchers set up a green laser beam in a dark room. A masked subject was then asked to speak so that the droplets from the speaker’s mouth showed up in the green beam.
Neat. My test method was to point-blank spray windex on one side and see if it's dry on the other
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