posted on Mar, 14 2007 @ 08:32 AM
I think its some sort of "shadow casting".........maybe.
I'm basing this on a similar effect i have observed with clouds, sunsets and alike.
Ive also seen chemtrails where it looks like they flicked a switch to turn it on/off and back off/on again.......
.....Then i realised the reason for this, a SHADOW made by a distant high up object, most likely a cloud,casting its shadow across part of chemtrail,
making it look INVISIBLE against a bright blue sky.And over a period of time, you notice the trail moves out of the shadow, and that it was unbroken
the whole time
Ive also seen chemtrail half black,half white durring sunset, eventually turning all black, this a believe is the shadow chasing the light along the
trail as the sun sets.
So my final take on the "black line" being IN FROUNT of the plane, would be .....
(this effect will greatly depend on sun postitioning in relation to the object to have straight line continuation).....
...the light being cast DIRECTLY behind the plane is blocked by the plane/trail, cuasing the "shadow" to be cast directly in frount, and with all
the atmospheric particulates and dust that gets illuminated by the sun, the shadow takes the form of a "slice" through this illumination.
thats my 2cents based only on what i have observed
[edit on 14-3-2007 by Anomic of Nihilism]