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This is untrue.
Quote from: Colin2B on 11/02/2017 12:20:12This is untrue.Is so true:) Try Googling "how can light have momentum but no mass" What if, instead of acting via momentum, light modifies time in such a way that a particle it acts on speeds up or slows down in a similar way to time dilation in relativity?
Colin2B is correct in order for relativity to be correct there is no momentum in light. Light is energy itself.