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But don't you agree with my comment regarding storing of electromagnetic energy?

Btw i have never learned fluid dynamics. Im no expert,i do have a flair for the obvious though.

Yes div(v)=0 is assumed. Its obvious since water gushes out of a pipe faster when you partially cover the opening. Its because whatever volume flowing into pipe per unit time=water flowing out of pipe per unit time.

No,Stokes and green theorems can be derived mathematically

I don't quite have a clue how it could be done practically

Theoretically speaking it would be possible to store light since the ponting vector has a non zero divergence.Which means that whatever power in form of electromagnetic fields flows into a closed surface,the same amount of power may not necessarily flow out of the surface.So there can be a net...

How can empty space act as individual point sources as in sinle slit diffraction?