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thanks man, i was reading about that y'day, and some sources seem to say that einstein and planck agreed. but that clarifies it alot. cheers

yeah, as long as its hot, it's incandescent. the reason that it's a curve and not just a straight line is coz the kinetic energy changes from atom to atom, one might be vibrating faster than another, so it gives off a higher frequency photon, then it has less energy. It can get more energy...

as they say shuter, everything is relative. if you're running down the cricket pitch at .9c, as in your thought experiment, and you were to see the flash when you're almost halfway down the pitch. the light would have to have been approaching you (relative to you) at 1.9c, which is of course...

jase that site is great, made perfect sense to me. explains things very well and logically. now zeropoint, i shall explain the problem i have with this experiment and the accompanying explanation as clearly as i can. and yes, i agree that light travels at 'c' no matter what your viewpoint...

length contraction comes into this in absolutely no way. the observer is standing in the middle of the train, and therefore each end will, according to the observer on the ground, shrink by exactly the same amount, as predicted by the Lorentz Transformations. therefore the distance from each...

ok based upon your reasoning, the opposite is indeed also possible, that the person on the train (who is in an inertial frame of reference) viewed both flashes as simultaneous. all you need to do is reverse positions. because both flashes had the same distance to travel (end of train to the...

i also just found this site it probably explains it better than i can http://homepage.mac.com/ardeshir/Einstein'sTrain.html it explains it quite well, but seems to find a way to contadict the theory of relativity, which i can't quite grasp. however, i think i must now concede that i/we are...

the incandescent lamp is something like a light globe, the element gets hot (incandescent), and makes a black body spectrum. the reason it's only theoretical, is that there is no perfect black body, even a light globe gives off larger spikes on certain frequencies because it is made of tungsten...

zeropoint just a small thing. um, you will agree with me that light cannot travel faster than 'c', and that in two identical mediums light will travel at ONLY 'c', regardless of the state of motion of the observer (in an inertial frame of reference). yes? now i see your point in the above...

the answer to that same relativity/simultaniety question is currently under discussion in the 'space' forum, so far we haven't managed to agree :(

omigod i'm hoping dearly that the peeps who post on here really are the smart bunch, otherwise i am well and truly stuffed. coz like with about 4 days to go, i pretty much just gave up on the whole damn thing, and i really could not give a flying f@#$ anymore. i just cannot wait to get my...

yeah, we had the same problem when we got told to do a superconductors assignment. from my research it seemed to be that the magnet will lift up, even if there is no relative motion between it and the superconductor when it goes below it's Tc. but we worked out that any small motion between the...

i find that the best way is to use galileo's method (which is the method we're taught): first, you've gotta split the horizontal and vertical components up using a right angled triangle, the initial velocity, and the angle (which you should also get given). the best way is to draw the...

uh huh, but what the book says, does not make one single bit of sense, apart from being garbled, it is contradictory

OK i can't make head nor tails of any of your explanations (which perhaps is the reason why relativity is sooo annoying). however, in the meantime i've checked with a physics professor from sydney uni and he agrees with my hypothesis. another thought has occured to me about this however...

Hey all, I've got this serious problem with Einstein's 'Train thought Experiment'. you know the one where there is an observer standing in the middle of a train moving at high velocity, which passes an observer who is relitavely stationary on a platform, at the same moment they pass, lightning...