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Originally Posted by
jdlilfan
I have been to a lot of airports but have never seen "light guns" along runways. I have seen Transmissometers though. They are devices that use a laser beam to detect atmospheric particles (smoke, dust, water vapor) and the density of them in a given calibrated space.
Transmissometer - Wikipedia, the free encyclopedia
Just sayin...
Ya say to someone who is already confusioned transmissomter at that point you will get
A look like this
Plus laser is still part of the light spectrum.
Last edited by lakehouse; 08-02-2011 at 01:40 PM.