I took this out of an aeroplane window on the way across the English Channel on the way home in October 2010. The view looks down through the clouds onto the water:
_Birefringence in Airplane Windows: Due to the manufacturing process, airplane windows are anisotropic – their physical properties depend on direction. The light passing through the window is split into different beams travelling at different speeds, resulting in interference. The inferference colours can be very interesting for the photographer.
Most often these patterns are rather faint, but if the incident light is already partially polarized, the colour effects can be easily detected without a polarising filter. If a polarising filter is used, these effects can be rather stunning._
Camera Canon EOS 5D Mark II
Exposure 0.004 sec (1/250)
Focal Length 70 mm
ISO Speed 100