Wanna Know What A Contrail Is?

as i was on my way to work in the morning, i came across a spectacular sight in white streaking high up in the sky. i have seen it once in a while and i thought it was just plain air pollution in the sky until lynda explained to me some time ago it's actually called a contrail.

according to wikipedia:

Contrails or vapour trails are condensation trails and artificial cirrus clouds made by the exhaust of aircraft engines or wingtip vortices which precipitate a stream of tiny ice crystals in moist, frigid upper air. They are not air pollution, though they might be considered visual pollution.

very nice. i showed lynda the picture and she surprised me with more information when she saw how the contrails were formed in the picture below: "hmmm, must be either from an A4 or an F16 lor"


"huh?" she threw me off into bewilderment. "airplanes lah" she shrugged me off with total impunity with her knowledge. this small girl damn zhai, everything also she knows.