Gullemsmcgee

well i just tried it out of curiosity. First the demo said my reading speed was 316 words per minute. Then I did all the exercises. Refreshed the webpage, started a new one, it gave me a different text. That time I got 662 words per minute. Seems pretty good to me.

Ok well im still a bit confused, but thanks that cleared it up a bit.

woops. gah, cant delete post D:

Sorry if this sounds stupid, but isn't it possible that as matter attracts matter, anti-matter repels matter? As a result, all the anti matter created in the beginning goes the other way from our "non anti-matter" matter, effectively creating a situation of 2 seperate .... what word could be used for it universes? Of course were such a simple reason the answer Im sure it would have been thought of, so perhaps you can explain to me why my simplistic reasoning is wrong ;o

But I don't see where that clashes with galilean transformations :s Hello, new here, today is the day before my physics exams and I am having a few mental problems with my relativity study . Sorry if I seem newbish, I am but a 17 year old student. Anyway, on with the question. According to one of maxwell's equations, the speed of light depends only on the electromagnetic constants of what its travelling through. No problem there, but then I dont see why this causes a clash with classic transformations. We say that A is cycling at 0.5c towards observer B, and shines a flashlight. Then we say that both see the light travelling at speed c. I can understand why light cannot exceed c, but the way I see it light doesnt necessarily have to appear to be c for observer A? If it is thought of as totally independant of A's velocity, then why cant it just take off and travel 0.5c faster than observer A, so to him it appears to move away at 0.5c whereas to B it appears to be c? In effect I suppose, I am challenging the second postulate. What proof is there for it, because as I see it simply that the speed of light is independant of the source is insufficient to say it is the same for all inertial observers. Furthermore, why couldnt someone move away from light at speed 0.5c and have it catch up to them at c? So basically, why must light appear to be c and not less than c? And if that can be proven with some explanation, then why does it occur in this scenario? Thanks