May 13, 2010

Many years ago, when I first set a toe into the world of advanced physics, I asked a question which was not in the textbooks. Today, I would ask that question differently, but it is still essentially the same question.

Then: Why is light, being massless, affected by gravity?

Now: If matter and energy are equivalent, separated only by a speed-of-light squared constant, why are they assymetrical? Specifically, why are both mass and energy influenced by mass-induced alterations in spacetime; but only mass is capable of shaping spacetime? (Why can energy be influenced gravitationally by mass, but not mass by energy?)

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