Hi, I have recently read a book called E=MC^2 (David Bodanis). It is an interesting book that goes over the history of the famous equation, but it left me with a few questions. The story goes into the issue of light being a combination of electric and magnetic fields, but doesn’t go much further. So far, I understand that light is an electromagnetic wave (or a photon, but ill stick with the wave idea), how exactly do these waves work? Could someone please explain this, or link me to a good online explanation? For instance, with a light bulb where electricity is passed through a thin (wire?) coil which then glows. I get that when electricity passes through a wire, a magnetic field is created looping around it. But how does this create light waves? I also am having trouble understanding why it is not (yet) possible to travel faster than the speed of light. In the book, ‘c’ is compared to –273 degrees C, or absolute zero, and that just as nothing can be colder than this, nothing can be faster than c. I understand that nothing can be colder as temperature is a measure of the vibration of particles, and at –273 these are no longer moving, but what is the reasoning behind the speed of light? All replies (or links) are greatly appreciated. Thank you in advance Tim P.S. – I apologise if this question has already been posted elsewhere on the forum. I searched but found no obviously appropriate posts, if there is one please link me to it.