- #1
worwhite
- 25
- 0
Hi,
I understand that EM fields have energy and they travel at c. Light is an EM field so it travels at c as well. So say you run a current through a wire - an EM field is generated, propogating outwards at c. Since an EM field is generated, and EM fields have energy, that energy has to come from somewhere. So does it mean that the current keeps losing energy due to this generation of EM field (assuming a perfect conducting material for the current)?
Thanks.
I understand that EM fields have energy and they travel at c. Light is an EM field so it travels at c as well. So say you run a current through a wire - an EM field is generated, propogating outwards at c. Since an EM field is generated, and EM fields have energy, that energy has to come from somewhere. So does it mean that the current keeps losing energy due to this generation of EM field (assuming a perfect conducting material for the current)?
Thanks.