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Dielectric constant distribution
|A corner reflector reflects radiation back in the direction from which it came over a wide range of acceptance angles. They can be used to calibrate meteorological radars.|
Wikipedia link: Corner reflector
This is an animation of the component of the electric field out of the plane of the page.
The direction in which energy is travelling at any instant is proportional to the cross product of the electric and magnetic fields, known as the Poynting vector. The arrows show the direction of the Poynting vector averaged over the simulation, while the colours show its strength.