Do not the Rays of Light which fall upon Bodies, and are reflected or refracted, begin to bend before they arrive at the Bodies; and are they not reflected, refracted, and inflected, by one and the same Principle, acting variously in various Circumstances?
Sir Isaac Newton (2016). “Opticks: A Treatise of the Reflections, Refractions, Inflections, and Colours of Light”, p.210, Library of Alexandria