Illusion of Contrail Asymmetry from Flying perpendicular to the Sun

Mick West

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Staff member
Metabunk 2018-02-25 09-16-03.jpg

In the above image it looks like one contrail starts at the far (right) wing, and the other starts at the tail.

The reason for this is the plane is flying almost exactly perpendicular to the sun, so the contrail on the near side was in shadow.
Metabunk 2018-02-25 09-24-56.jpg

This effect is observed all the time, but I think this a particularly nice example due t the view angle. The dark contrail is in line with the fuselage, which is clearly visible. This makes it look even more like the contrail is not there.

In fact the contrails are exactly the same on each side. The real illusion here is the sense that the well lit contrail is opaque. It's just as transparent as the other side, but it's emitting a lot of scattered light.

Metabunk 2018-02-25 09-30-30.jpg

As the plane passed directly under the sun it briefly glinted along its entire length in what might look like the form of a confusing UFO if taken out of context

Metabunk 2018-02-25 09-32-28.jpg

Real time clip, partially stabilized.
DSCN7662-stabsclip.gif
 
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