Recent content by dot

To clarify By centre of the toroid I mean not the core of the toroid, but the empty space of the "window in the doughnut" or the hole in a "Polo" mint. This space is also empty of any field as far as I know at least in an ideal toroidal transformer.

This question relates to 50Hz power toroidal transformers. Toroidal transformers are well known for their self shielding properties and consequently have a near-zero external field. Most of the magnetic flux lies within the core. Yet if one where to thread a good conductor through the...

After much thinking about this, I have some good news - finally what all you experts have been telling me has filtered through, and I have found the flaw in my argument that did not allow me to understand SR. My logic was 1. The lightning bolts strike simultaneously in M frame (embankment)...

Thanks very much Eli for your last reply and it makes the most sense so far. I was going to answer your previous explanation, that it was really equivalent to saying that the speed of light was constant only with respect to the frame in which it originates and different for all other frames in...

Thanks JesseM for your explanation and I agree with it perfectly: According to the STR 1. If M sees the flashes simultaneously then M' must see them at different times. 2. If M' sees the flashes simultaneously then M must see them at different times. What I don't agree with is that the...

Thank you very much for your answers. However I remain unconvinced. HallsofIvy said that the situation has been changed. I can't see how. Eistain's argument assumes that the embankment is at a standstill and arrives at the conclusion that the person on the train sees the flashes at...

As an example to demonstrate the relativity of simultaneous events Einstein used the train thought experiment. The argument envisages a very long tran moving at constant velocity with respect to an infinitely long embankment. A lightning strikes the embankment at a point A coincident with one...