a few words from others.
the acceleration of light
the natural resonance frequency of the cesium atom (9,192,631,770 Hz)
it may be that the (unknown lightforms or waves ) can travel along the cessium waves and like a surfer riding a wave are pushed or accelerated from wave to wave.

maybe not.
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3/4 inch of dust build up on the moon in 4.527 billion years,LOL and QM is fantasy science.