: Newtonian mechanics only predicts the deflection of an object's path if the object has mass. Lose the mass and you lose the deflection. For that reason Newtonian mechanics has not predicted the deflection of light for a very long time. Surprisingly, the article already cites a source, citation no. 32, that says this in so many words. | : Newtonian mechanics only predicts the deflection of an object's path if the object has mass. Lose the mass and you lose the deflection. For that reason Newtonian mechanics has not predicted the deflection of light for a very long time. Surprisingly, the article already cites a source, citation no. 32, that says this in so many words. |