Interesting piece about physical distancing on RTÉ’s 9pm news last night.
Some lab demonstrating the passage of respiratory droplets using a high speed camera.
When the subject was breathing normally(through the nose with mouth closed), droplets came out of the nose at a speed and trajectory which would have them land on the ground no more than 2 metres away.
When the subject coughed, the volume and speed of the droplets was much greater, and trajectory different, which would send the droplets much further.
With sneezing the speed is greater again, and the distance further.
No mention of joggers huffing and puffing and spitting. But the 2m limit seems to be an absolute minimum distance between people breathing normally.
Some lab demonstrating the passage of respiratory droplets using a high speed camera.
When the subject was breathing normally(through the nose with mouth closed), droplets came out of the nose at a speed and trajectory which would have them land on the ground no more than 2 metres away.
When the subject coughed, the volume and speed of the droplets was much greater, and trajectory different, which would send the droplets much further.
With sneezing the speed is greater again, and the distance further.
No mention of joggers huffing and puffing and spitting. But the 2m limit seems to be an absolute minimum distance between people breathing normally.