4 ms·

I don't think there's any reason to assume vapour from a pen resembles the droplets in your breath. In fact, that one of them is visible and the other is not sh

I don't think there's any reason to assume vapour from a pen resembles the droplets in your breath. In fact, that one of them is visible and the other is not should suggest that they might behave very differently.

anonytrary 6y ago
Mask hole size >> size of o2, n2, co2, and pretty much any aromatic molecule, so I doubt it.