| Energy (1115 words) |
 | The primary source of the conservation of energy theorem has been, and will continue to be, the experimental impossibility of perpetual motion, an impossibility that must exist whatever our ideas may be on the portions of energy that the ether is obliged to supply in the absence of material bodies. |
| Poynting's theorem, in demanding only the possibility of the transformation of an integral of volume (already partly arbitrary) to an integral of surface, expresses a lot less. |
| Poynting's theorem expresses the law of energy only when we replace the fields with their representations based on retarded potentials, a restriction which removes a lot of its elegance and scope. |
Feeds |
Contact