In science fiction laser/energy weapons are depicted as having no recoil (such as a phaser in Star trek.) Now my question: If humans were to develop energy weapons would they actually be recoil-less or would they have recoil? The reason I'm asking is because physics isn't my strong suit.
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Yes, there would, indeed, be recoil but it would be so insignificant that for all practical purposes it would be non-existent. It's similar to how light can push a solar sail on a much smaller scale.