““What really transcends our understanding is the mechanism that permits these oscillations of abstract field quantities to carry energy. We know this is true; our relevant equations say so, and the solar energy collectors prove it. A photoelectric cell registers at this instant an energy that left the Sun, in the form of light, some eight minutes ago. Travelling across space, this light did not lose its energy; rather, it is part of the energetic excitations within empty space.””
