Unformatted text preview: • The speed of light in a vacuum has the same value, c, in all inertial frames. The speed of light in a vacuum is always independent of the velocity of the source of the light or the velocity of the observer. The entire theory of special relativity is derived from these two postulates. Light Path in Oframe Light Path in O'frame ) ( 2 2 2 2 2 2 2 = − − − + + = = z y x ct z y x d ct d ) ( 2 2 2 2 2 2 2 = ′ − ′ − ′ − ′ ′ + ′ + ′ = ′ ′ = ′ z y x t c z y x d t c d Must find the transformation that results in 2 2 2 2 2 2 2 2 ) ( ) ( z y x t c z y x ct ′ − ′ − ′ − ′ = − − − 2.99792458x10 8 m/s y x z y' z' x' V Light Ray O: (t,x,y,z) O': (t'.x',y',z') O O' Experimental observation! Invariant! inertial...
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 Spring '07
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 Physics, Special Relativity, Light, Speed of light

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