Recent content by Seeker2K

So it seems that QED isn't absolutely necessary to explain the Huygens principle. It is only needed to explain the behaviour of single photons. Yes, of course they are only models, but it's the best we currently have to try to explain and understand how the universe works - and that's what...

Seems you are right... Yes, I took a look at the thread and at the papers. Dieks' "Time in special relativity and its philosophical significance" sounds interesting, but unfortunately I can only access the abstract. The paper by Mauro Dorato is interesting as well, but apparently he is...

At http://en.wikipedia.org/wiki/Spacetime#Historical_origin I read the following quote: Wouldn't this imply that the universe (respectively spacetime) is actually static and that the present doesn't really exist except for our consciousness? And wouldn't this also imply that in such a...

So as I see it Huygens principle can also explain the refraction of light - but after reading the Wikipedia article I'm not quite sure how Huygens principle can be combined with QED. Does light advance through space like the wave fronts in Huygens principle or does it advance over any and all...

Yes, it's only an extremum... okay. Anyway, in the case I was talking about it's a minimum. To explain the case of the lawnmower, well, just take a look at the picture: http://web.archive.org/web/20051226204611/http://physics.usc.edu/~bars/135/LectureNotes/LightOptics_files/image028.jpg...

According to Fermat's principle the path taken between two points by a ray of light is the path that can be traversed in the least time. So if the ray is refracted and if you take two points, one from before and one from after the refraction, the path taken between them was the one that takes...