Quote:
Originally Posted by White Rabbit
I used the Mathcentre when I did my UNI prep course a few years back. Their work sheets are really good.
Thanks for the replies but I have a few questions.
When you say"It's a photon....it doesn't experience any time at all, since it's traveling at the speed of light." do you mean this in the sense that because it is a photon it can not experience anything because it is not conscious?
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No, nothing like that (although who's to say what a photon thinks
). A photon doesn't experience any time because the amount of time dilation that occurs at the speed of light is infinite (which means there's something wrong with the theory....infinities are a curse, but more on that later). Time effectively stands still for the photon, so everything it perceives is NOW. A photon leaving M31 now, would in its world view, have already arrived here.
But for us it's a 2.5 million year long ride