Re: A 'Massless' question?



A ray of light travels along what is referred to as a "null geodesic".
Since it is massless, it cannot accelerate, even along a geodesic path.
but if a ray of light is bending...or changing its direction,then it is
accelerating....so how is its 'velocity constant<shrug>
Thus, it is essentially following the curvature of spacetime, moving
everywhere along the path at a constant speed c.

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