Einstein's Theory of Relativity - Is Light Speed Absolute?

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"everything is relative"

hy guys,so Einstein jad a quote "everything is relative" but he proved that lightspeed has speed c relative to any reference frame ,doesn t that means that c is absolute?


hope i made myself clear.
 
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hi squareroot! :smile:

yes, c is absolute

(but the energy and momentum of light are relative)
 


squareroot said:
hy guys,so Einstein jad a quote "everything is relative"
Really? Did he? Can you provide a source for that quotation?
squareroot said:
but he proved that lightspeed has speed c relative to any reference frame ,doesn t that means that c is absolute?
Yes, and therefore he wanted to call his theory "The Theory of Invariants".
 

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