Author Topic: Relativity  (Read 17602 times)

Offline legacyblade

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Re: Relativity
« Reply #40 on: November 30, 2009, 02:29:59 AM »
That sounds like some interesting stuff. I can't wait to take a look at it o.o (I LOVE theoretical physics. Not so hot on the applied science though, it's less interesting)

Offline winkio

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Re: Relativity
« Reply #41 on: November 30, 2009, 03:46:09 AM »

Offline Ryex

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Re: Relativity
« Reply #42 on: March 09, 2010, 07:18:58 AM »
I'm nobody appreciates your hard work in scanning that lecture, personally I would read it, but it's not there any more. however I think I would be better of starting with something the introduced my to the subject a bit better than this tread dose. while I always been interested in the subject I've never really looked into it. perhaps it could tell my what negative mass would really entail :P
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Offline winkio

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Re: Relativity
« Reply #43 on: March 09, 2010, 09:45:59 AM »
I'll reupload it sometime later this week.

Offline Caligatio

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Re: Relativity
« Reply #44 on: March 23, 2010, 01:30:18 PM »
Einstein's theory of Relativity is built off of the fact that the speed of light is constant in all inertial frames.  That means that if you are standing still, the speed of light relative to you is 3 * 10^8 m/s.  And if you are moving at 2*10^8 m/s, the speed of light relative to you is still 3 * 10^8 m/s.  This has been proven true by experimentation, so then we have to come up with a theory to explain it.  It turns out that this with this new theory, not much changes until you move at 0.1c (c is the speed of light).  But as long as the speed of light is always constant, then all these other weird things happen.  Like when you observe something that is moving very fast relative to you, it gets shorter (length contraction).  And when you observe something that is moving very fast relative to you, its clock is slower (time dilation).  And then there's the doppler shift, which is where the frequency of perceived light is altered by the reference frame of the observer.  Basically,

Believe it or not, I surely understand now. Thanks, I didn't got the whole thing of the speed of light shit, but now it's all clear!