Recent content by danskal

The easiest way to think about it is if you have a solid rod held by an observer alongside it, moving at the same speed. The observer won't notice anything relativistic, because from their point of view nothing is moving at relativistic speeds (except the surroundings, which, for this...

The point LukeD is trying to make, is that if you have a strong enough beam e.g. laser light, there is zero distance between them - they overlap. You can in principle even have what "looks" like a single photon, that actually is 2 photons overlapping completely - just twice as "strong".

Magnitude just means "size" or "bigness" - so it can be used in many different situations. Pythagoras' theorem just helps us to calculate magnitude in some situations: If you imagine a graph with x going across and y going upwards, you can draw a line from the centre (where the axes...