Light that is moving through a pure vacuum, tends to be propagated in a straight line. This, however, does not take into consideration the generally mild influence, that the force of gravity works to impose upon the propagation of electromagnetic energy. Space-Time-Fabric is not perfectly straight -- it is curved, -- and such a tendency of space-time-curvature, tends to be basically due to the direct influence of gravity upon physical phenomenology. The force of gravity is a significantly weaker force than the electrostatic force. This is why -- when the respective gravitational force is of a relatively low level of scalar magnitude -- the influence of gravity upon light, does not have very much of an effect upon both how "straight" and how "fast" that the said light is being propagated in a pure vacuum. Yet, when the force of gravity is of an extremely strong scalar magnitude -- such as with a black-hole -- then, any proximal local light will bend, due to the so-eluded-to gravitational force of such a case, to where the correlative electromagnetic energy will not even be able to escape the then eminent condition of being bent into the so-stated given arbitrary respective black-hole of such a case scenario. Furthermore -- the more physically isolated that any given arbitrary beam of light is, from other physical phenomenology in outer space, -- to where the then directly corresponding gravitational force is basically null upon such a respective beam, -- then, the less influenced that the said beam of light will be, from being neither bent at all nor slowed at all by the correlative force of gravity.
I will continue with the suspense later! To Be Continued! Sincerely, Samuel David Roach.
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