Dielectric constant distribution
Wikipedia link: Convex lens
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Dielectric constant distribution
| This animation illustrates the focussing effect of a convex lens. Note that the radiation cannot be focussed to a smaller scale than the wavelength. There are also internal reflections within the lens itself. Wikipedia link: Convex lens |
Electric field animation | Time-averaged Poynting vector |
| 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. |